fast-jwt vulnerabilities

Browse known CVEs and advisories by package and ecosystem. Severity tells you the worst case. What determines real risk is whether the vulnerable code actually runs in your applications.

Browse by ecosystem

npm PyPI Maven Go RubyGems Cargo NuGet Composer pub Swift GitHub Actions

CVE-IDSeverityPackage summary

CVE-2026-44351Criticalfast-jwt: fast-jwt: JWT auth bypass due to empty HMAC secret accepted by async key resolver CVE-2026-35041Mediumfast-jwt: fast-jwt has a ReDoS when using RegExp in allowed* leading to CPU exhaustion during token…CVE-2026-35040Mediumfast-jwt: fast-jwt: Stateful RegExp (/g or /y) causes non-deterministic allowed-claim validation (logical DoS)CVE-2026-35042Highfast-jwt: fast-jwt accepts unknown `crit` header extensions (RFC 7515 violation)CVE-2026-35039Criticalfast-jwt: fast-jwt: Cache Confusion via cacheKeyBuilder Collisions Can Return Claims From a Different Token…CVE-2026-34950Criticalfast-jwt: fast-jwt: Incomplete fix for CVE-2023-48223: JWT Algorithm Confusion via Whitespace-Prefixed RSA…CVE-2025-30144Mediumfast-jwt: Fast-JWT Improperly Validates iss Claims CVE-2023-48223Mediumfast-jwt: JWT Algorithm Confusion

Stop the waste.
Protect your environment with Kodem.

Get a personalized demo

Get a personalized demo