{"id":"CVE-2026-116630","title":"undici vulnerable to cross-user information disclosure via cross-origin redirect revalidation","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, when an Agent composes the redirect and shared cache interceptors, a cached response that is revalidated with a conditional request can be v…","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-346","CWE-524"],"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":"2026-11-06T10:13:44.685Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-116630","references":[{"url":"https://github.com/nodejs/undici/security/advisories/GHSA-5rm8-gv32-r954"},{"url":"https://cna.openjsf.org/security-advisories.html"}],"tags":["cve.org"],"ingestedAt":"2026-11-06T10:49:35.398Z","epss":0.00148,"epssPercentile":0.03999,"slug":"CVE-2026-116630","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, when an Agent composes the redirect and shared cache interceptors, a cached response that is revalidated with a conditional request can be validated by a 304 Not Modified from a different origin. When the origin that stored the response redirects the conditional revalidation request to another origin, the redirect handler strips origin-bound credential headers but not the cache-generated If-None-Match or If-Modified-Since validators, so the redirect destination receives the original origin's validator and undici treats its 304 as successful revalidation of the stored representation. As a result, a shared cache can serve the original origin's stored authenticated response, including one gated by Authorization, to a later unauthenticated caller. 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, compose the interceptors as cache then redirect, use per-origin dispatchers and cache stores, or disable shared caching on redirect-capable requests.\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":32,"depthScoreParts":{"impact":32.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}