376 lines
19 KiB
JSON
376 lines
19 KiB
JSON
{
|
|
"dataType": "CVE_RECORD",
|
|
"dataVersion": "5.2",
|
|
"cveMetadata": {
|
|
"cveId": "CVE-2026-53428",
|
|
"assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
|
|
"state": "PUBLISHED",
|
|
"assignerShortName": "EEF",
|
|
"dateReserved": "2026-06-09T11:01:47.529Z",
|
|
"datePublished": "2026-06-29T18:52:36.199Z",
|
|
"dateUpdated": "2026-06-30T04:38:36.755Z"
|
|
},
|
|
"containers": {
|
|
"cna": {
|
|
"affected": [
|
|
{
|
|
"collectionURL": "https://repo.hex.pm",
|
|
"cpes": [
|
|
"cpe:2.3:a:leandrocp:mdex:*:*:*:*:*:*:*:*"
|
|
],
|
|
"defaultStatus": "unaffected",
|
|
"modules": [
|
|
"'Elixir.MDEx'",
|
|
"comrak_nif"
|
|
],
|
|
"packageName": "mdex",
|
|
"packageURL": "pkg:hex/mdex",
|
|
"product": "mdex",
|
|
"programFiles": [
|
|
"native/comrak_nif/src/lumis_adapter.rs"
|
|
],
|
|
"programRoutines": [
|
|
{
|
|
"name": "comrak_nif::lumis_adapter::LumisAdapter::parse_highlight_lines"
|
|
},
|
|
{
|
|
"name": "'Elixir.MDEx':to_html/2"
|
|
}
|
|
],
|
|
"repo": "https://github.com/leandrocp/mdex",
|
|
"vendor": "leandrocp",
|
|
"versions": [
|
|
{
|
|
"lessThan": "0.12.3",
|
|
"status": "affected",
|
|
"version": "0.11.0",
|
|
"versionType": "semver"
|
|
}
|
|
]
|
|
},
|
|
{
|
|
"collectionURL": "https://github.com",
|
|
"cpes": [
|
|
"cpe:2.3:a:leandrocp:mdex:*:*:*:*:*:*:*:*"
|
|
],
|
|
"defaultStatus": "unaffected",
|
|
"modules": [
|
|
"'Elixir.MDEx'",
|
|
"comrak_nif"
|
|
],
|
|
"packageName": "leandrocp/mdex",
|
|
"packageURL": "pkg:github/leandrocp/mdex",
|
|
"product": "mdex",
|
|
"programFiles": [
|
|
"native/comrak_nif/src/lumis_adapter.rs"
|
|
],
|
|
"programRoutines": [
|
|
{
|
|
"name": "comrak_nif::lumis_adapter::LumisAdapter::parse_highlight_lines"
|
|
},
|
|
{
|
|
"name": "'Elixir.MDEx':to_html/2"
|
|
}
|
|
],
|
|
"repo": "https://github.com/leandrocp/mdex",
|
|
"vendor": "leandrocp",
|
|
"versions": [
|
|
{
|
|
"lessThan": "6ed94d905f97af188323f042698ae841c02293b4",
|
|
"status": "affected",
|
|
"version": "a8407611715d1ead35fbcba79c72cef1b7df387b",
|
|
"versionType": "git"
|
|
}
|
|
]
|
|
},
|
|
{
|
|
"collectionURL": "https://repo.hex.pm",
|
|
"cpes": [
|
|
"cpe:2.3:a:leandrocp:mdex_native:*:*:*:*:*:*:*:*"
|
|
],
|
|
"defaultStatus": "unaffected",
|
|
"modules": [
|
|
"'Elixir.MDExNative.Comrak'",
|
|
"mdex_native_nif"
|
|
],
|
|
"packageName": "mdex_native",
|
|
"packageURL": "pkg:hex/mdex_native",
|
|
"product": "mdex_native",
|
|
"programFiles": [
|
|
"native/mdex_native_nif/src/lumis_adapter.rs"
|
|
],
|
|
"programRoutines": [
|
|
{
|
|
"name": "mdex_native_nif::lumis_adapter::LumisAdapter::parse_highlight_lines"
|
|
},
|
|
{
|
|
"name": "'Elixir.MDExNative.Native':document_to_html_with_options/2"
|
|
},
|
|
{
|
|
"name": "'Elixir.MDExNative.Comrak':document_to_html/2"
|
|
}
|
|
],
|
|
"repo": "https://github.com/leandrocp/mdex_native",
|
|
"vendor": "leandrocp",
|
|
"versions": [
|
|
{
|
|
"lessThan": "0.2.3",
|
|
"status": "affected",
|
|
"version": "0.1.0",
|
|
"versionType": "semver"
|
|
}
|
|
]
|
|
},
|
|
{
|
|
"collectionURL": "https://github.com",
|
|
"cpes": [
|
|
"cpe:2.3:a:leandrocp:mdex_native:*:*:*:*:*:*:*:*"
|
|
],
|
|
"defaultStatus": "unaffected",
|
|
"modules": [
|
|
"'Elixir.MDExNative.Comrak'",
|
|
"mdex_native_nif"
|
|
],
|
|
"packageName": "leandrocp/mdex_native",
|
|
"packageURL": "pkg:github/leandrocp/mdex_native",
|
|
"product": "mdex_native",
|
|
"programFiles": [
|
|
"native/mdex_native_nif/src/lumis_adapter.rs"
|
|
],
|
|
"programRoutines": [
|
|
{
|
|
"name": "mdex_native_nif::lumis_adapter::LumisAdapter::parse_highlight_lines"
|
|
},
|
|
{
|
|
"name": "'Elixir.MDExNative.Native':document_to_html_with_options/2"
|
|
},
|
|
{
|
|
"name": "'Elixir.MDExNative.Comrak':document_to_html/2"
|
|
}
|
|
],
|
|
"repo": "https://github.com/leandrocp/mdex_native",
|
|
"vendor": "leandrocp",
|
|
"versions": [
|
|
{
|
|
"lessThan": "798a363b4339f6f7162ec8437c4c9f9b5ae6fbf3",
|
|
"status": "affected",
|
|
"version": "956528c5e31746253347029e810a969ab916fd27",
|
|
"versionType": "git"
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"configurations": [
|
|
{
|
|
"lang": "en",
|
|
"supportingMedia": [
|
|
{
|
|
"base64": false,
|
|
"type": "text/html",
|
|
"value": "<p>Exploitation requires the application to enable code-block decorators. Decorators are active only when the render options <tt>github_pre_lang</tt> and <tt>full_info_string</tt> are both set and an inline syntax-highlight formatter (for example <tt>{:html_inline, ...}</tt>) is configured. Applications that render Markdown with the default options do not parse <tt>highlight_lines</tt> specifications and are not affected.</p>"
|
|
}
|
|
],
|
|
"value": "Exploitation requires the application to enable code-block decorators. Decorators are active only when the render options github_pre_lang and full_info_string are both set and an inline syntax-highlight formatter (for example {:html_inline, ...}) is configured. Applications that render Markdown with the default options do not parse highlight_lines specifications and are not affected."
|
|
}
|
|
],
|
|
"cpeApplicability": [
|
|
{
|
|
"nodes": [
|
|
{
|
|
"cpeMatch": [
|
|
{
|
|
"criteria": "cpe:2.3:a:leandrocp:mdex:*:*:*:*:*:*:*:*",
|
|
"versionEndExcluding": "0.12.3",
|
|
"versionStartIncluding": "0.11.0",
|
|
"vulnerable": true
|
|
}
|
|
],
|
|
"negate": false,
|
|
"operator": "AND"
|
|
},
|
|
{
|
|
"cpeMatch": [
|
|
{
|
|
"criteria": "cpe:2.3:a:leandrocp:mdex_native:*:*:*:*:*:*:*:*",
|
|
"versionEndExcluding": "0.2.3",
|
|
"versionStartIncluding": "0.1.0",
|
|
"vulnerable": true
|
|
}
|
|
],
|
|
"negate": false,
|
|
"operator": "AND"
|
|
}
|
|
],
|
|
"operator": "OR"
|
|
}
|
|
],
|
|
"credits": [
|
|
{
|
|
"lang": "en",
|
|
"type": "finder",
|
|
"value": "Peter Ullrich"
|
|
},
|
|
{
|
|
"lang": "en",
|
|
"type": "remediation developer",
|
|
"value": "Leandro Pereira"
|
|
},
|
|
{
|
|
"lang": "en",
|
|
"type": "analyst",
|
|
"value": "Jonatan Männchen / EEF"
|
|
}
|
|
],
|
|
"descriptions": [
|
|
{
|
|
"lang": "en",
|
|
"supportingMedia": [
|
|
{
|
|
"base64": false,
|
|
"type": "text/html",
|
|
"value": "Memory Allocation with Excessive Size Value vulnerability in leandrocp mdex allows an unauthenticated attacker to cause a denial of service through unbounded memory allocation.<p><tt>comrak_nif::lumis_adapter::LumisAdapter::parse_highlight_lines</tt> in <tt>native/comrak_nif/src/lumis_adapter.rs</tt> eagerly expands a user-controlled inclusive line range from a fenced code block's <tt>highlight_lines</tt> decorator into a <tt>Vec<usize></tt>, pushing one element per integer in the range with no upper bound on the range size. An attacker who can supply Markdown that an application renders with <tt>MDEx.to_html/2</tt> (for example a comment, chat message, or wiki page) can embed a code block whose info string is <tt>rust highlight_lines=\"1-100000000\"</tt>, forcing the native adapter to allocate roughly 8 bytes per line in the range.</p><p>A payload that differs by only a few bytes can therefore allocate hundreds of megabytes, and a sufficiently large range (for example <tt>1-2000000000</tt>) exhausts host memory and aborts the BEAM, denying service to every user of the rendering process. The per-line write loop additionally tests membership with a linear scan over the same vector, degrading rendering to a quadratic cost even for ranges that do not immediately exhaust memory.</p><p>The vulnerable native code originally shipped inside <tt>mdex</tt> (in <tt>native/comrak_nif/src/lumis_adapter.rs</tt>) and was later extracted into the separate <tt>mdex_native</tt> package (<tt>native/mdex_native_nif/src/lumis_adapter.rs</tt>), where it remains unpatched.</p><p>This issue affects mdex from 0.11.0 before 0.12.3, and mdex_native from 0.1.0 before 0.2.3.</p>"
|
|
}
|
|
],
|
|
"value": "Memory Allocation with Excessive Size Value vulnerability in leandrocp mdex allows an unauthenticated attacker to cause a denial of service through unbounded memory allocation.\n\ncomrak_nif::lumis_adapter::LumisAdapter::parse_highlight_lines in native/comrak_nif/src/lumis_adapter.rs eagerly expands a user-controlled inclusive line range from a fenced code block's highlight_lines decorator into a Vec<usize>, pushing one element per integer in the range with no upper bound on the range size. An attacker who can supply Markdown that an application renders with MDEx.to_html/2 (for example a comment, chat message, or wiki page) can embed a code block whose info string is rust highlight_lines=\"1-100000000\", forcing the native adapter to allocate roughly 8 bytes per line in the range.\n\nA payload that differs by only a few bytes can therefore allocate hundreds of megabytes, and a sufficiently large range (for example 1-2000000000) exhausts host memory and aborts the BEAM, denying service to every user of the rendering process. The per-line write loop additionally tests membership with a linear scan over the same vector, degrading rendering to a quadratic cost even for ranges that do not immediately exhaust memory.\n\nThe vulnerable native code originally shipped inside mdex (in native/comrak_nif/src/lumis_adapter.rs) and was later extracted into the separate mdex_native package (native/mdex_native_nif/src/lumis_adapter.rs), where it remains unpatched.\n\nThis issue affects mdex from 0.11.0 before 0.12.3, and mdex_native from 0.1.0 before 0.2.3."
|
|
}
|
|
],
|
|
"impacts": [
|
|
{
|
|
"capecId": "CAPEC-130",
|
|
"descriptions": [
|
|
{
|
|
"lang": "en",
|
|
"value": "CAPEC-130 Excessive Allocation"
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"metrics": [
|
|
{
|
|
"cvssV4_0": {
|
|
"attackComplexity": "LOW",
|
|
"attackRequirements": "PRESENT",
|
|
"attackVector": "LOCAL",
|
|
"baseScore": 6.9,
|
|
"baseSeverity": "MEDIUM",
|
|
"privilegesRequired": "NONE",
|
|
"subAvailabilityImpact": "HIGH",
|
|
"subConfidentialityImpact": "NONE",
|
|
"subIntegrityImpact": "NONE",
|
|
"userInteraction": "NONE",
|
|
"vectorString": "CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H",
|
|
"version": "4.0",
|
|
"vulnAvailabilityImpact": "HIGH",
|
|
"vulnConfidentialityImpact": "NONE",
|
|
"vulnIntegrityImpact": "NONE"
|
|
},
|
|
"format": "CVSS",
|
|
"scenarios": [
|
|
{
|
|
"lang": "en",
|
|
"value": "GENERAL"
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"problemTypes": [
|
|
{
|
|
"descriptions": [
|
|
{
|
|
"cweId": "CWE-789",
|
|
"description": "CWE-789 Memory Allocation with Excessive Size Value",
|
|
"lang": "en",
|
|
"type": "CWE"
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"providerMetadata": {
|
|
"orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
|
|
"shortName": "EEF",
|
|
"dateUpdated": "2026-06-30T04:38:36.755Z"
|
|
},
|
|
"references": [
|
|
{
|
|
"tags": [
|
|
"vendor-advisory",
|
|
"related"
|
|
],
|
|
"url": "https://github.com/leandrocp/mdex_native/security/advisories/GHSA-j93q-9cvj-rxfm"
|
|
},
|
|
{
|
|
"tags": [
|
|
"related"
|
|
],
|
|
"url": "https://cna.erlef.org/cves/CVE-2026-53428.html"
|
|
},
|
|
{
|
|
"tags": [
|
|
"related"
|
|
],
|
|
"url": "https://osv.dev/vulnerability/EEF-CVE-2026-53428"
|
|
},
|
|
{
|
|
"tags": [
|
|
"patch"
|
|
],
|
|
"url": "https://github.com/leandrocp/mdex_native/commit/798a363b4339f6f7162ec8437c4c9f9b5ae6fbf3"
|
|
}
|
|
],
|
|
"source": {
|
|
"discovery": "EXTERNAL"
|
|
},
|
|
"title": "Unbounded memory allocation in highlight_lines range expansion in mdex",
|
|
"workarounds": [
|
|
{
|
|
"lang": "en",
|
|
"supportingMedia": [
|
|
{
|
|
"base64": false,
|
|
"type": "text/html",
|
|
"value": "<p>Do not enable code-block decorators: leave the <tt>github_pre_lang</tt> and <tt>full_info_string</tt> render options unset, or avoid configuring an inline syntax-highlight formatter, so that <tt>highlight_lines</tt> specifications are never parsed.</p>"
|
|
}
|
|
],
|
|
"value": "Do not enable code-block decorators: leave the github_pre_lang and full_info_string render options unset, or avoid configuring an inline syntax-highlight formatter, so that highlight_lines specifications are never parsed."
|
|
}
|
|
],
|
|
"x_generator": {
|
|
"engine": "cvelib 1.8.0"
|
|
}
|
|
},
|
|
"adp": [
|
|
{
|
|
"metrics": [
|
|
{
|
|
"other": {
|
|
"type": "ssvc",
|
|
"content": {
|
|
"timestamp": "2026-06-29T19:17:11.005816Z",
|
|
"id": "CVE-2026-53428",
|
|
"options": [
|
|
{
|
|
"Exploitation": "none"
|
|
},
|
|
{
|
|
"Automatable": "no"
|
|
},
|
|
{
|
|
"Technical Impact": "partial"
|
|
}
|
|
],
|
|
"role": "CISA Coordinator",
|
|
"version": "2.0.3"
|
|
}
|
|
}
|
|
}
|
|
],
|
|
"title": "CISA ADP Vulnrichment",
|
|
"providerMetadata": {
|
|
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
|
|
"shortName": "CISA-ADP",
|
|
"dateUpdated": "2026-06-29T19:17:25.070Z"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
} |