Technology · npm
fast-jwt (npm) vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 8 vulnerabilities in fast-jwt (npm): 0 in the last 7 days and 0 in the last 90 days, 1 of them critical and 0 exploited in the wild. The most recent, CVE-2026-44351, was published on 13 May 2026.
- Last 7 days
- 0
- Last 90 days
- 0
- Critical, all time
- 1
- Exploited in the wild
- 0
About fast-jwt (npm)
A library for JSON Web Token (JWT) signing and verification optimized for performance.
Latest fast-jwt (npm) vulnerabilities
- CVE-2026-44351: nearform fast-jwt authentication bypass in async key resolvercriticalCVSS 9.1EPSS 0.3%
- CVE-2026-35041: fast-jwt ReDoS in regexp claim validation leading to CPU exhaustionlowCVSS 3.1EPSS 0.4%
- CVE-2026-35040: fast-jwt stateful RegExp causes non-deterministic claim validationlowCVSS 3.1EPSS 0.6%
- CVE-2026-35042: fast-jwt crit header validation bypasslowCVSS 3.1EPSS 0.2%
- CVE-2026-35039: fast-jwt cacheKeyBuilder collision identity mixuplowCVSS 3.1EPSS 0.2%
- CVE-2026-34950: NearForm fast-jwt algorithm confusion via whitespace-prefixed RSA public keylowCVSS 3.1EPSS 0.3%
- CVE-2025-30144: NearForm Fast-JWT improper iss claim validationlowCVSS 3.1EPSS 0.6%
- CVE-2023-48223: fast-jwt JWT algorithm confusionlowCVSS 3.1EPSS 0.7%
Most severe fast-jwt (npm) vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- CVE-2026-44351: nearform fast-jwt authentication bypass in async key resolvercriticalCVSS 9.1EPSS 0.3%
- CVE-2023-48223: fast-jwt JWT algorithm confusionlowCVSS 3.1EPSS 0.7%
- CVE-2026-35040: fast-jwt stateful RegExp causes non-deterministic claim validationlowCVSS 3.1EPSS 0.6%
- CVE-2025-30144: NearForm Fast-JWT improper iss claim validationlowCVSS 3.1EPSS 0.6%
- CVE-2026-35041: fast-jwt ReDoS in regexp claim validation leading to CPU exhaustionlowCVSS 3.1EPSS 0.4%
- CVE-2026-34950: NearForm fast-jwt algorithm confusion via whitespace-prefixed RSA public keylowCVSS 3.1EPSS 0.3%
- CVE-2026-35039: fast-jwt cacheKeyBuilder collision identity mixuplowCVSS 3.1EPSS 0.2%
- CVE-2026-35042: fast-jwt crit header validation bypasslowCVSS 3.1EPSS 0.2%
Vulnerabilities per week
The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 29 Jun 2026 | 0 | 0 | |
| 6 Jul 2026 | 0 | 0 | |
| 13 Jul 2026 | 0 | 0 | |
| 20 Jul 2026 | 0 | 0 | |
| 27 Jul 2026 | 0 | 0 | |
| 3 Aug 2026 | 0 | 0 | |
| 10 Aug 2026 | 0 | 0 | |
| 17 Aug 2026 | 0 | 0 | |
| 24 Aug 2026 | 0 | 0 | |
| 31 Aug 2026 | 0 | 0 | |
| 7 Sep 2026 | 0 | 0 | |
| 14 Sep 2026 | 0 | 0 | |
| 21 Sep 2026 | 0 | 0 |
How this is built
Junglewise Threat Intelligence collects vulnerabilities from NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories, and matches each one to the technologies and vendors it affects. Dates are the date a vulnerability was published, in UTC.
The pages are rebuilt from the database every hour. Frozen weekly and monthly reports never change once published, so they can be cited.
Use this data
The same data is at https://junglewise.ai/threats/technologies/fast-jwt.json, for scripts and language models. It is free to reuse under CC BY 4.0 with a link back to this page.
Cite as: Junglewise Threat Intelligence, "fast-jwt (npm) vulnerabilities", https://junglewise.ai/threats/technologies/fast-jwt, 26 September 2026.