CVE-2026-35041
- Source
- https://cve.org/CVERecord?id=CVE-2026-35041
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-35041.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-35041
- Aliases
- Published
- 2026-04-09T14:55:22Z
- Modified
- 2026-10-21T02:30:58Z
- Severity
-
- 4.2 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- ReDoS in fast-jwt when using RegExp in allowed* leading to CPU exhaustion during token verification
- Details
-
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.
- Database specific
{ "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-1333" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/35xxx/CVE-2026-35041.json" }- References
-
- https://github.com/nearform/fast-jwt/releases/tag/v6.2.1
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/35xxx/CVE-2026-35041.json
- https://github.com/nearform/fast-jwt/security/advisories/GHSA-cjw9-ghj4-fwxf
- https://nvd.nist.gov/vuln/detail/CVE-2026-35041
- https://github.com/nearform/fast-jwt/commit/b0be0ca161593836a153d5180ca5358ad9b5de94
- https://github.com/nearform/fast-jwt/pull/595
Affected packages
Git / github.com/nearform/fast-jwt
Affected ranges
- Type
- GIT
- Repo
- https://github.com/nearform/fast-jwt
- Events
- Database specific
-
Show details
{ "extracted_events": [ { "cpe": "cpe:2.3:a:nearform:fast-jwt:*:*:*:*:*:node.js:*:*", "range": [ { "introduced": "5.0.0" }, { "fixed": "6.2.1" } ], "source": "CPE_RANGE" }, { "range": [ { "fixed": "b0be0ca161593836a153d5180ca5358ad9b5de94" } ], "source": "REFERENCES_COMMIT" }, { "original_tag": "v6.2.1", "range": [ { "fixed": "6b13fe96614a38613d453f46ba0631c4cd09dcd8" } ], "source": "REFERENCES_TAG" } ] }