290 lines
16 KiB
JSON
290 lines
16 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-94201",
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"assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
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"state": "PUBLISHED",
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"assignerShortName": "EEF",
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"dateReserved": "2026-09-24T09:15:02.216Z",
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"datePublished": "2026-10-05T19:19:51.326Z",
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"dateUpdated": "2026-10-06T13:41:22.142Z"
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},
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"containers": {
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"cna": {
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"affected": [
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{
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"collectionURL": "https://repo.hex.pm",
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"cpes": [
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"cpe:2.3:a:ash-project:ash:*:*:*:*:*:*:*:*"
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],
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"defaultStatus": "unaffected",
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"modules": [
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"'Elixir.Ash.Type.Atom'"
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],
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"packageName": "ash",
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"packageURL": "pkg:hex/ash",
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"product": "ash",
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"programFiles": [
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"lib/ash/type/atom.ex"
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],
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"programRoutines": [
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{
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"name": "'Elixir.Ash.Type.Atom':cast_value/2"
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}
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],
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"repo": "https://github.com/ash-project/ash",
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"vendor": "ash-project",
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"versions": [
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{
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"lessThan": "3.34.3",
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"status": "affected",
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"version": "3.5.1",
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"versionType": "semver"
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}
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]
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},
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{
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"collectionURL": "https://github.com",
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"cpes": [
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"cpe:2.3:a:ash-project:ash:*:*:*:*:*:*:*:*"
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],
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"defaultStatus": "unaffected",
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"modules": [
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"'Elixir.Ash.Type.Atom'"
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],
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"packageName": "ash-project/ash",
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"packageURL": "pkg:github/ash-project/ash",
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"product": "ash",
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"programFiles": [
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"lib/ash/type/atom.ex"
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],
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"programRoutines": [
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{
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"name": "'Elixir.Ash.Type.Atom':cast_value/2"
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}
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],
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"repo": "https://github.com/ash-project/ash",
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"vendor": "ash-project",
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"versions": [
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{
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"lessThan": "5282f3f513053628cdd1bf2236ea22d975d934d4",
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"status": "affected",
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"version": "2970ba3bd5d36d6ad04c731ac87385375d457147",
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"versionType": "git"
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}
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]
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}
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],
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"configurations": [
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{
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"lang": "en",
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"supportingMedia": [
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{
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"base64": false,
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"type": "text/html",
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"value": "<p>Reachable only when an application exposes a public, filterable <code>:atom</code> attribute declared with the <code>unsafe_to_atom?: true</code> constraint, and an actor can supply filter values for it (for example through AshGraphql, AshJsonApi, or <code>Ash.Query.filter_input/2</code>). AshPaperTrail's version resources ship such an attribute (<code>version_action_name</code>) by default.</p>"
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},
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{
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"base64": false,
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"type": "text/markdown",
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"value": "Reachable only when an application exposes a public, filterable `:atom` attribute declared with the `unsafe_to_atom?: true` constraint, and an actor can supply filter values for it (for example through AshGraphql, AshJsonApi, or `Ash.Query.filter_input/2`). AshPaperTrail's version resources ship such an attribute (`version_action_name`) by default."
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}
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],
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"value": "Reachable only when an application exposes a public, filterable :atom attribute declared with the unsafe_to_atom?: true constraint, and an actor can supply filter values for it (for example through AshGraphql, AshJsonApi, or Ash.Query.filter_input/2). AshPaperTrail's version resources ship such an attribute (version_action_name) by default."
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"cpeMatch": [
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{
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"criteria": "cpe:2.3:a:ash-project:ash:*:*:*:*:*:*:*:*",
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"versionEndExcluding": "3.34.3",
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"versionStartIncluding": "3.5.1",
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"vulnerable": true
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}
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],
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"negate": false,
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"operator": "OR"
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}
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],
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"operator": "AND"
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}
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],
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"credits": [
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{
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"lang": "en",
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"type": "finder",
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"value": "Quinn Wilton"
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},
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{
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"lang": "en",
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"type": "reporter",
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"value": "Quinn Wilton"
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},
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{
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"lang": "en",
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"type": "remediation developer",
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"value": "Zach Daniel / Ash Project"
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},
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{
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"lang": "en",
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"type": "coordinator",
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"value": "Jonatan Männchen / EEF"
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}
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],
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"dateAssigned": "2026-10-04T15:49:18.000Z",
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"descriptions": [
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{
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"lang": "en",
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"supportingMedia": [
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{
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"base64": false,
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"type": "text/html",
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"value": "<p>Ash stores <code>:atom</code>-typed attributes as strings and compares them as strings. When such an attribute is referenced in a filter, the comparison value is coerced through <code>Ash.Type.Atom</code>. Because the type defined no <code>coerce/2</code> callback, coercion fell back to the default (<code>cast_input/2</code>), which calls <code>String.to_atom/1</code> when the attribute is configured with the <code>unsafe_to_atom?: true</code> constraint.</p>\n<p>Filtering such an attribute with attacker-controlled strings therefore interned a new, permanent atom for every distinct value. Atoms are never garbage collected and the BEAM caps the atom table, so an actor who can supply filter values for a public, filterable <code>:atom</code> attribute declared with <code>unsafe_to_atom?: true</code> can exhaust the atom table and crash the node (denial of service). AshPaperTrail is a notable example: its version resources expose a public, filterable <code>version_action_name</code> atom attribute with <code>unsafe_to_atom?: true</code> by default.</p>\n<p>The fix adds a <code>coerce/2</code> to <code>Ash.Type.Atom</code> that never interns atoms — a comparison value is left as a string, since the type is stored and compared as a string. Setting the attribute from action input (<code>cast_input/2</code>, which still honors <code>unsafe_to_atom?</code>) is unchanged.</p>\n<p>This issue affects ash: from 3.5.1 before 3.34.3.</p>"
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},
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{
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"base64": false,
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"type": "text/markdown",
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"value": "Ash stores `:atom`-typed attributes as strings and compares them as strings. When such an attribute is referenced in a filter, the comparison value is coerced through `Ash.Type.Atom`. Because the type defined no `coerce/2` callback, coercion fell back to the default (`cast_input/2`), which calls `String.to_atom/1` when the attribute is configured with the `unsafe_to_atom?: true` constraint.\n\nFiltering such an attribute with attacker-controlled strings therefore interned a new, permanent atom for every distinct value. Atoms are never garbage collected and the BEAM caps the atom table, so an actor who can supply filter values for a public, filterable `:atom` attribute declared with `unsafe_to_atom?: true` can exhaust the atom table and crash the node (denial of service). AshPaperTrail is a notable example: its version resources expose a public, filterable `version_action_name` atom attribute with `unsafe_to_atom?: true` by default.\n\nThe fix adds a `coerce/2` to `Ash.Type.Atom` that never interns atoms — a comparison value is left as a string, since the type is stored and compared as a string. Setting the attribute from action input (`cast_input/2`, which still honors `unsafe_to_atom?`) is unchanged.\n\nThis issue affects ash: from 3.5.1 before 3.34.3."
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}
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],
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"value": "Ash stores :atom-typed attributes as strings and compares them as strings. When such an attribute is referenced in a filter, the comparison value is coerced through Ash.Type.Atom. Because the type defined no coerce/2 callback, coercion fell back to the default (cast_input/2), which calls String.to_atom/1 when the attribute is configured with the unsafe_to_atom?: true constraint.\n\nFiltering such an attribute with attacker-controlled strings therefore interned a new, permanent atom for every distinct value. Atoms are never garbage collected and the BEAM caps the atom table, so an actor who can supply filter values for a public, filterable :atom attribute declared with unsafe_to_atom?: true can exhaust the atom table and crash the node (denial of service). AshPaperTrail is a notable example: its version resources expose a public, filterable version_action_name atom attribute with unsafe_to_atom?: true by default.\n\nThe fix adds a coerce/2 to Ash.Type.Atom that never interns atoms — a comparison value is left as a string, since the type is stored and compared as a string. Setting the attribute from action input (cast_input/2, which still honors unsafe_to_atom?) is unchanged.\n\nThis issue affects ash: from 3.5.1 before 3.34.3."
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}
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],
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"impacts": [
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{
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"capecId": "CAPEC-130",
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"descriptions": [
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{
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"lang": "en",
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"value": "CAPEC-130 Excessive Allocation"
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}
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]
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}
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],
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"metrics": [
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{
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"cvssV4_0": {
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"Automatable": "NOT_DEFINED",
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"Recovery": "NOT_DEFINED",
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"Safety": "NOT_DEFINED",
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"attackComplexity": "LOW",
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"attackRequirements": "PRESENT",
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"attackVector": "NETWORK",
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"baseScore": 8.2,
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"baseSeverity": "HIGH",
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"privilegesRequired": "NONE",
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"providerUrgency": "NOT_DEFINED",
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"subAvailabilityImpact": "NONE",
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"subConfidentialityImpact": "NONE",
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"subIntegrityImpact": "NONE",
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"userInteraction": "NONE",
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"valueDensity": "NOT_DEFINED",
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"vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
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"version": "4.0",
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"vulnAvailabilityImpact": "HIGH",
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"vulnConfidentialityImpact": "NONE",
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"vulnIntegrityImpact": "NONE",
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"vulnerabilityResponseEffort": "NOT_DEFINED"
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},
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"format": "CVSS",
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"scenarios": [
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{
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"lang": "en",
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"value": "GENERAL"
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}
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]
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}
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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"cweId": "CWE-770",
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"description": "CWE-770 Allocation of Resources Without Limits or Throttling",
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"lang": "en",
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"type": "CWE"
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}
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]
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}
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],
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"providerMetadata": {
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"orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
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"shortName": "EEF",
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"dateUpdated": "2026-10-05T19:19:51.326Z"
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},
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"references": [
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{
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"name": "EEF CNA record for CVE-2026-94201",
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"tags": [
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"related",
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"third-party-advisory"
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],
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"url": "https://cna.erlef.org/cves/CVE-2026-94201.html"
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},
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{
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"name": "OSV record EEF-CVE-2026-94201",
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"tags": [
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"related"
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],
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"url": "https://osv.dev/vulnerability/EEF-CVE-2026-94201"
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},
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{
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"name": "Introducing commit 2970ba3 in ash-project/ash",
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"tags": [
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"related"
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],
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"url": "https://github.com/ash-project/ash/commit/2970ba3bd5d36d6ad04c731ac87385375d457147"
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},
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{
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"name": "Fix commit 5282f3f in ash-project/ash",
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"tags": [
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"patch"
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],
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"url": "https://github.com/ash-project/ash/commit/5282f3f513053628cdd1bf2236ea22d975d934d4"
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}
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],
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"source": {
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"discovery": "EXTERNAL"
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},
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"title": "Filtering an :atom attribute with unsafe_to_atom? can exhaust the BEAM atom table in Ash"
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},
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2026-10-06T13:41:07.117450Z",
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"id": "CVE-2026-94201",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"role": "CISA Coordinator",
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"version": "2.0.3"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-10-06T13:41:22.142Z"
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}
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}
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]
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}
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} |