{"id":"CVE-2026-120222","title":"undici vulnerable to Denial of Service via unhandled exception in cache-interceptor response replay","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 the cache interceptor is composed with a downstream handler that throws during response processing (such as the built-in dump intercept…","severity":"medium","cvss":5.9,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","cvssSource":"cna","cwe":["CWE-248","CWE-755"],"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":"2026-11-06T10:00:50.635Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-120222","references":[{"url":"https://github.com/nodejs/undici/security/advisories/GHSA-3g9m-rv3r-w5w2"},{"url":"https://cna.openjsf.org/security-advisories.html"}],"tags":["cve.org"],"ingestedAt":"2026-11-06T10:49:35.401Z","epss":0.00308,"epssPercentile":0.23776,"slug":"CVE-2026-120222","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 the cache interceptor is composed with a downstream handler that throws during response processing (such as the built-in dump interceptor exceeding its maxSize, or the decompress interceptor rejecting more than five Content-Encoding values), a throw raised asynchronously while a cached response is replayed escapes as an uncaught exception or unhandled promise rejection and terminates the Node.js process. A malicious or compromised HTTP server can crash any such client by serving a cacheable response that triggers the throw on replay, including on a 304 revalidation of a stale entry, so the impact is availability only. 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, avoid composing the cache interceptor with a response handler that throws during response processing until upgrading.\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":[]}