fast-jwt vulnerabilities and fixes

Recent CVEs affecting fast-jwt, with upgrade or downgrade steps. 1 tracked.

fast-jwt has 1 tracked vulnerability, 1 critical. A fixed release or vendor patch exists for 1. Most recent: 2026-04-06. Highest priority: CVE-2026-35039 (score 43/100).

• CVE-2026-35039 CRITICAL 9.1 UPGRADE fast-jwt provides fast JSON Web Token (JWT) implementation

FAQ

How do I fix fast-jwt vulnerabilities?

Open the CVE for your version, check the affected range, then follow the listed action: upgrade to the fixed release, or downgrade or mitigate if no fix exists yet. Commands for each OS are shown on every CVE page.

Is fast-jwt being exploited right now?

None of the tracked fast-jwt CVEs are on the CISA Known Exploited Vulnerabilities list at the moment. This is checked every 20 minutes.

Which fast-jwt CVE should I patch first?

CVE-2026-35039 currently ranks highest (43/100): fast-jwt provides fast JSON Web Token (JWT) implementation.

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