CVE-2026-35040
unknown
CVSS v3
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CVSS v4 NEW
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VIR risk
—
Description
fast-jwt: Stateful RegExp (/g or /y) causes non-deterministic allowed-claim validation (logical DoS)
Predictions
Exploit likelihood
30%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| npm | fast-jwt | <6.2.1 | 6.2.1 |
References
- https://github.com/nearform/fast-jwt/security/advisories/GHSA-3j8v-cgw4-2g6q
- https://nvd.nist.gov/vuln/detail/CVE-2026-35040
- https://github.com/nearform/fast-jwt/pull/593
- https://github.com/nearform/fast-jwt/commit/18d25904e4617e8753526d1b3ab5a2cccdea726a
- https://github.com/nearform/fast-jwt
- https://github.com/nearform/fast-jwt/releases/tag/v6.2.1
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.