Is fast-jwt affected by CVE-2026-35041?

npm fast-jwt is affected in >=5.0.0 <6.2.1.

Is CVE-2026-35041 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.3%.

medium

CVE-2026-35041

Q: Is CVE-2026-35041 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.3%.

npm · fast-jwt

Summary

fast-jwt has a ReDoS when using RegExp in allowed* leading to CPU exhaustion during token verification

Severity: medium
EPSS: 0.3% (p17)
Also known as: GHSA-cjw9-ghj4-fwxf
Published: 2026-04-09

References

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/pull/595

Related advisories

CVE-2026-44351 — critical · npm/fast-jwt
CVE-2026-35039 — critical · npm/fast-jwt
CVE-2026-34950 — critical · npm/fast-jwt
CVE-2026-35042 — high · npm/fast-jwt
CVE-2026-35040 — medium · npm/fast-jwt

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Sources: CISA KEV (public domain), OSV.dev & GitHub Advisory Database (CC-BY-4.0), FIRST EPSS, NVD/CWE (public domain). Served live from the Stateward advisory database.