{"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": "2026-10-05T16:25:19.098Z"}, "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"}}}}

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