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vuln-cve/data/2026/12xxx/CVE-2026-12171.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-12171",
"assignerOrgId": "7ffcee3d-2c14-4c3e-b844-86c6a321a158",
"state": "PUBLISHED",
"assignerShortName": "harborist",
"dateReserved": "2026-06-12T21:15:49.095Z",
"datePublished": "2026-10-05T16:25:19.098Z",
"dateUpdated": "2026-10-05T19:04:19.152Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "7ffcee3d-2c14-4c3e-b844-86c6a321a158",
"shortName": "harborist",
"dateUpdated": "2026-10-05T16:25:19.098Z"
},
"title": "auto-changelog: code execution via untrusted in-repository configuration (handlebarsSetup/plugins), plus argument injection, path traversal, and SSRF",
"problemTypes": [
{
"descriptions": [
{
"lang": "en",
"cweId": "CWE-829",
"description": "CWE-829: Inclusion of Functionality from Untrusted Control Sphere",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"lang": "en",
"cweId": "CWE-94",
"description": "CWE-94: Improper Control of Generation of Code ('Code Injection')",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"lang": "en",
"cweId": "CWE-88",
"description": "CWE-88: Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"lang": "en",
"cweId": "CWE-22",
"description": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"lang": "en",
"cweId": "CWE-918",
"description": "CWE-918: Server-Side Request Forgery (SSRF)",
"type": "CWE"
}
]
}
],
"affected": [
{
"vendor": "cookpete",
"product": "auto-changelog",
"collectionURL": "https://www.npmjs.com/",
"packageName": "auto-changelog",
"repo": "https://github.com/cookpete/auto-changelog",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "2.6.1",
"versionType": "semver"
}
],
"defaultStatus": "unaffected"
}
],
"descriptions": [
{
"lang": "en",
"value": "auto-changelog before 2.6.1 merges configuration from inside the target repository (the .auto-changelog file and the auto-changelog key in package.json) into its options, and honors security-sensitive options from that untrusted source. The handlebarsSetup option is passed to require(), so running auto-changelog over attacker-controlled repository content (for example, in a CI workflow that checks out an untrusted pull request head, or locally on a forked or third-party repository) executes attacker-chosen code with the privileges of the invoking user or CI job, including access to workflow secrets, without the repository dependencies ever being installed. The plugins option similarly loads attacker-controlled modules from the repository. Under the same conditions, appendGitLog/appendGitTag allow git argument injection (e.g. --output= to write arbitrary files), output allows writing attacker-influenced content to arbitrary paths, and template causes an outbound request to an attacker-chosen URL. Version 2.6.1 treats in-repository configuration as untrusted and refuses to run when it sets these options, unless the new --unsafe-config flag is passed.",
"supportingMedia": [
{
"type": "text/html",
"base64": false,
"value": "<p>auto-changelog before 2.6.1 merges configuration from inside the target repository (the <code>.auto-changelog</code> file and the <code>auto-changelog</code> key in <code>package.json</code>) into its options, and honors security-sensitive options from that untrusted source. The <code>handlebarsSetup</code> option is passed to <code>require()</code>, so running auto-changelog over attacker-controlled repository content (for example, in a CI workflow that checks out an untrusted pull request head, or locally on a forked or third-party repository) executes attacker-chosen code with the privileges of the invoking user or CI job, including access to workflow secrets, without the repository dependencies ever being installed. The <code>plugins</code> option similarly loads attacker-controlled modules from the repository. Under the same conditions, <code>appendGitLog</code>/<code>appendGitTag</code> allow git argument injection (e.g. <code>--output=</code> to write arbitrary files), <code>output</code> allows writing attacker-influenced content to arbitrary paths, and <code>template</code> causes an outbound request to an attacker-chosen URL. Version 2.6.1 treats in-repository configuration as untrusted and refuses to run when it sets these options, unless the new <code>--unsafe-config</code> flag is passed.</p>"
}
]
}
],
"references": [
{
"url": "https://github.com/cookpete/auto-changelog/security/advisories/GHSA-xpvr-2hvx-m8q4",
"tags": [
"vendor-advisory"
]
},
{
"url": "https://github.com/cookpete/auto-changelog/commit/1d02a48a0a57c69a3cd268aca375d64d50877c1a",
"tags": [
"patch"
]
}
],
"metrics": [
{
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
],
"cvssV4_0": {
"attackVector": "LOCAL",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"privilegesRequired": "NONE",
"userInteraction": "ACTIVE",
"vulnConfidentialityImpact": "HIGH",
"subConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "HIGH",
"subIntegrityImpact": "NONE",
"vulnAvailabilityImpact": "HIGH",
"subAvailabilityImpact": "NONE",
"exploitMaturity": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"valueDensity": "NOT_DEFINED",
"vulnerabilityResponseEffort": "NOT_DEFINED",
"providerUrgency": "NOT_DEFINED",
"version": "4.0",
"baseSeverity": "HIGH",
"baseScore": 8.4,
"vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
}
},
{
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
],
"cvssV3_1": {
"version": "3.1",
"attackVector": "LOCAL",
"attackComplexity": "LOW",
"privilegesRequired": "NONE",
"userInteraction": "REQUIRED",
"scope": "UNCHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"availabilityImpact": "HIGH",
"baseSeverity": "HIGH",
"baseScore": 7.8,
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"
}
}
],
"workarounds": [
{
"lang": "en",
"value": "Do not run auto-changelog over untrusted repository content, including CI workflows that check out pull request heads from forks.",
"supportingMedia": [
{
"type": "text/html",
"base64": false,
"value": "<p>Do not run auto-changelog over untrusted repository content, including CI workflows that check out pull request heads from forks.</p>"
}
]
}
],
"solutions": [
{
"lang": "en",
"value": "Upgrade to auto-changelog 2.6.1 or later. Options that load code, inject git arguments, write outside the repository, or fetch URLs must now be passed on the command line; `--unsafe-config` restores the old behavior for fully trusted repositories only.",
"supportingMedia": [
{
"type": "text/html",
"base64": false,
"value": "<p>Upgrade to auto-changelog 2.6.1 or later. Options that load code, inject git arguments, write outside the repository, or fetch URLs must now be passed on the command line; `--unsafe-config` restores the old behavior for fully trusted repositories only.</p>"
}
]
}
],
"credits": [
{
"lang": "en",
"value": "d00xy-hash",
"type": "finder"
},
{
"lang": "en",
"value": "Jordan Harband (ljharb)",
"type": "coordinator"
}
],
"source": {
"advisory": "GHSA-xpvr-2hvx-m8q4",
"discovery": "EXTERNAL"
},
"x_generator": {
"engine": "Vulnogram 0.2.0"
}
},
"adp": [
{
"references": [
{
"url": "https://github.com/cookpete/auto-changelog/security/advisories/GHSA-xpvr-2hvx-m8q4",
"tags": [
"exploit"
]
}
],
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-10-05T19:03:58.537396Z",
"id": "CVE-2026-12171",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-10-05T19:04:19.152Z"
}
}
]
}
}
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