{"id":"CVE-2026-120415","title":"undici vulnerable to cross-origin credential disclosure via array-of-tuples headers bypassing redirect stripping","summary":"undici is an HTTP client for Node.js. In versions 7.0.0 through 7.30.1 and 8.0.0 through 8.12.3, the redirect interceptor strips sensitive headers such as Authorization, Cookie, Proxy-Authorization, and Host when a request is redirected …","severity":"medium","cvss":5.9,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","cvssSource":"cna","cwe":["CWE-200","CWE-212"],"vendor":"undici","product":"undici","affected":["undici >= 7.0.0 < 7.30.2","undici >= 8.0.0 < 8.12.4"],"published":"2026-11-06","updated":"2026-11-06","sourceUpdated":"2026-11-06T10:10:48.653Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-120415","references":[{"url":"https://github.com/nodejs/undici/security/advisories/GHSA-9v6h-8rgp-m69f"},{"url":"https://cna.openjsf.org/security-advisories.html"}],"tags":["cve.org"],"ingestedAt":"2026-11-06T10:49:35.399Z","epss":0.003,"epssPercentile":0.22891,"slug":"CVE-2026-120415","body":"## Overview\n\nundici is an HTTP client for Node.js. In versions 7.0.0 through 7.30.1 and 8.0.0 through 8.12.3, the redirect interceptor strips sensitive headers such as Authorization, Cookie, Proxy-Authorization, and Host when a request is redirected to a different origin, but when request headers are supplied as an array of name and value tuples (a valid documented input, for example from Object.entries), the redirect handler misreads them as a flat list so the header names never match and the sensitive headers are not removed. If a header-normalizing interceptor such as cache or deduplicate is composed outside the redirect interceptor, it then serializes the retained headers onto the cross-origin request, disclosing the caller's origin-bound credentials to the unrelated redirect destination. This is a representation-dependent bypass of the cross-origin header stripping added in CVE-2024-30260. The issue is fixed in undici 7.30.2 and 8.12.4, and users should upgrade to one of those versions or later. As a workaround, supply request headers as a plain object or a flat name and value array rather than an array of tuples, or compose the redirect interceptor outside the normalizing interceptor.\n\n## Affected\n\n- `undici >= 7.0.0 < 7.30.2`\n- `undici >= 8.0.0 < 8.12.4`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":33,"depthScoreParts":{"impact":32.5,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}