{"id":"EUVD-2026-20899","revision":"a3c4fcee560247758cf83ec7f39f9a22","records":[{"revision":"a3c4fcee560247758cf83ec7f39f9a22","observedAt":"2026-10-28T04:54:31.895+00:00","statement":{"source":"euvd","id":"EUVD-2026-20899","aliases":["CVE-2026-35041","GHSA-cjw9-ghj4-fwxf"],"title":"fast-jwt provides fast JSON Web Token (JWT) implementation. From 5.0.0 to 6.2.0, a denial-of-service condition exists in fast-jwt when the allowedAud verification option is configured using a regular expression. Because the aud claim is att…","description":"fast-jwt provides fast JSON Web Token (JWT) implementation. From 5.0.0 to 6.2.0, a denial-of-service condition exists in fast-jwt when the allowedAud verification option is configured using a regular expression. Because the aud claim is attacker-controlled and the library evaluates it against the supplied RegExp, a crafted JWT can trigger catastrophic backtracking in the JavaScript regex engine, resulting in significant CPU consumption during verification. This vulnerability is fixed in 6.2.1.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:N/A:H","score":4.2,"severity":null}],"references":["https://github.com/nearform/fast-jwt/security/advisories/GHSA-cjw9-ghj4-fwxf","https://github.com/nearform/fast-jwt/pull/595","https://github.com/nearform/fast-jwt/commit/b0be0ca161593836a153d5180ca5358ad9b5de94","https://github.com/nearform/fast-jwt/releases/tag/v6.2.1"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-20899","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Apr 9, 2026, 2:55:22 PM","dateUpdated":"Apr 9, 2026, 4:15:25 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-20899","identifiers":["EUVD-2026-20899","CVE-2026-35041","GHSA-cjw9-ghj4-fwxf"]},"retained":false,"historicalAffected":[]}],"coverage":[]}