{"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"}}]}}