154 lines
7.0 KiB
JSON
154 lines
7.0 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-2026-47261",
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"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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"state": "PUBLISHED",
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"assignerShortName": "GitHub_M",
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"dateReserved": "2026-05-18T23:03:37.229Z",
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"datePublished": "2026-06-15T19:47:40.366Z",
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"dateUpdated": "2026-06-16T12:46:04.260Z"
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},
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"containers": {
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"cna": {
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"title": "Wasmtime: WASI path_open(TRUNCATE) bypasses `FilePerms::WRITE` host restriction",
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"problemTypes": [
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{
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"descriptions": [
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{
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"cweId": "CWE-284",
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"lang": "en",
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"description": "CWE-284: Improper Access Control",
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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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"metrics": [
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{
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"cvssV3_1": {
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"attackComplexity": "LOW",
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"attackVector": "NETWORK",
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"availabilityImpact": "NONE",
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"baseScore": 7.5,
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"baseSeverity": "HIGH",
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"confidentialityImpact": "NONE",
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"integrityImpact": "HIGH",
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"privilegesRequired": "NONE",
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"scope": "UNCHANGED",
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"userInteraction": "NONE",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
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"version": "3.1"
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}
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}
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],
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"references": [
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{
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"name": "https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-2r75-cxrj-cmph",
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"tags": [
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"x_refsource_CONFIRM"
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],
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"url": "https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-2r75-cxrj-cmph"
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},
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{
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"name": "https://github.com/bytecodealliance/wasmtime/releases/tag/v24.0.9",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/bytecodealliance/wasmtime/releases/tag/v24.0.9"
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},
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{
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"name": "https://github.com/bytecodealliance/wasmtime/releases/tag/v36.0.10",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/bytecodealliance/wasmtime/releases/tag/v36.0.10"
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},
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{
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"name": "https://github.com/bytecodealliance/wasmtime/releases/tag/v44.0.2",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/bytecodealliance/wasmtime/releases/tag/v44.0.2"
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},
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{
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"name": "https://github.com/bytecodealliance/wasmtime/releases/tag/v45.0.0",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/bytecodealliance/wasmtime/releases/tag/v45.0.0"
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}
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],
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"affected": [
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{
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"vendor": "bytecodealliance",
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"product": "wasmtime",
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"versions": [
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{
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"version": ">= 37.0.0, < 44.0.2",
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"status": "affected"
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},
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{
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"version": ">= 25.0.0, < 36.0.10",
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"status": "affected"
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},
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{
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"version": "< 24.0.9",
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"status": "affected"
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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": "a0819718-46f1-4df5-94e2-005712e83aaa",
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"shortName": "GitHub_M",
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"dateUpdated": "2026-06-15T19:47:40.366Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "Wasmtime is a runtime for WebAssembly. In versions prior to 24.0.9, 36.0.10, and 44.0.2, when a filesystem preopen is given DirPerms::all() and FilePerms::READ without FilePerms::WRITE, this access control mechanism can be bypassed via the wasip2 descriptor.open-at or wasip1 path_open interfaces by opening a file with only the OpenFlags::TRUNCATE oflag. The root cause is that the clause handling OpenFlags::TRUNCATE in crates/wasi/src/filesystem.rs (Dir::open_at, lines 967–969) did not set open_mode |= OpenMode::WRITE;, which is later used for the access control check against FilePerms to determine whether opening the file is permitted; the single-line fix adds that missing assignment, after which the affected calls correctly fail with error-code.not-permitted and ERRNO_PERM respectively. Only wasmtime-wasi embeddings that combine DirPerms::MUTATE with FilePerms::READ are affected by this bug. In particular, the Wasmtime project's wasmtime-cli's use of wasmtime-wasi is not affected, because it always sets FilePerms::all() for all preopens. This issue has been fixed in versions 24.0.9, 36.0.10 and44.0.2."
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}
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],
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"source": {
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"advisory": "GHSA-2r75-cxrj-cmph",
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"discovery": "UNKNOWN"
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}
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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": "2026-06-16T12:45:55.792446Z",
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"id": "CVE-2026-47261",
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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": "yes"
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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": "2026-06-16T12:46:04.260Z"
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}
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}
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]
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}
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} |