Technology · npm
fast-jwt (npm) vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 14 vulnerabilities in fast-jwt (npm): 0 in the last 7 days and 6 in the last 90 days, 4 of them critical and 0 exploited in the wild. The most recent, CVE-2026-107724, was published on 8 October 2026. Nothing in the last four weeks, down from 6 vulnerabilities in the four before. 0 critical against 1.
- Last 7 days
- 0
- Last 90 days
- 6
- Critical, all time
- 4
- Exploited in the wild
- 0
About fast-jwt (npm)
JavaScript library for creating and verifying JSON Web Tokens with optimized performance.
Latest fast-jwt (npm) vulnerabilities
- CVE-2026-107724: fast-jwt JWK JSON HMAC secret misclassification in HS256 verificationhighCVSS 7.4EPSS 0.2%
- CVE-2026-107723: fast-jwt claim-validator bypass with JSON array payloadhighCVSS 8.1EPSS 0.4%
- CVE-2026-107722: fast-jwt incomplete RSA-to-HS256 algorithm confusion fixcriticalCVSS 9.8EPSS 0.3%
- CVE-2026-107721: fast-jwt clockTolerance validation bypass in expiry and not-before checksmediumCVSS 5.9EPSS 0.3%
- CVE-2026-107720: fast-jwt signature verification bypass with null/empty keyhighCVSS 7.4EPSS 0.3%
- CVE-2026-107719: fast-jwt expiration bypass in token cachingmediumCVSS 4.2EPSS 0.2%
- 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 exhaustionmediumCVSS 4.2EPSS 0.3%
- CVE-2026-35040: fast-jwt stateful RegExp causes non-deterministic claim validationmediumCVSS 5.3EPSS 0.4%
- CVE-2026-35042: fast-jwt crit header validation bypasshighCVSS 7.5EPSS 0.2%
- CVE-2026-35039: fast-jwt cacheKeyBuilder collision identity mixupcriticalCVSS 9.1EPSS 0.2%
- CVE-2026-34950: NearForm fast-jwt algorithm confusion via whitespace-prefixed RSA public keycriticalCVSS 9.1EPSS 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-2026-107722: fast-jwt incomplete RSA-to-HS256 algorithm confusion fixcriticalCVSS 9.8EPSS 0.3%
- CVE-2026-44351: nearform fast-jwt authentication bypass in async key resolvercriticalCVSS 9.1EPSS 0.3%
- CVE-2026-34950: NearForm fast-jwt algorithm confusion via whitespace-prefixed RSA public keycriticalCVSS 9.1EPSS 0.3%
- CVE-2026-35039: fast-jwt cacheKeyBuilder collision identity mixupcriticalCVSS 9.1EPSS 0.2%
- CVE-2026-107723: fast-jwt claim-validator bypass with JSON array payloadhighCVSS 8.1EPSS 0.4%
- CVE-2026-35042: fast-jwt crit header validation bypasshighCVSS 7.5EPSS 0.2%
- CVE-2026-107720: fast-jwt signature verification bypass with null/empty keyhighCVSS 7.4EPSS 0.3%
- CVE-2026-107724: fast-jwt JWK JSON HMAC secret misclassification in HS256 verificationhighCVSS 7.4EPSS 0.2%
- CVE-2026-107721: fast-jwt clockTolerance validation bypass in expiry and not-before checksmediumCVSS 5.9EPSS 0.3%
- CVE-2026-35040: fast-jwt stateful RegExp causes non-deterministic claim validationmediumCVSS 5.3EPSS 0.4%
Vulnerabilities per week
Nothing in the last four weeks, down from 6 vulnerabilities in the four before. 0 critical against 1. The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 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 | |
| 28 Sep 2026 | 0 | 0 | |
| 5 Oct 2026 | 6 | 1 | |
| 12 Oct 2026 | 0 | 0 | |
| 19 Oct 2026 | 0 | 0 | |
| 26 Oct 2026 | 0 | 0 | |
| 2 Nov 2026 | 0 | 0 | |
| 9 Nov 2026 | 0 | 0 |
Embed a badge
A live badge for a README, a status page or an internal wiki: how many fast-jwt (npm) vulnerabilities were published in the last 7 days and how many of them are critical, refreshed hourly.
[](https://junglewise.ai/threats/technologies/fast-jwt)<a href="https://junglewise.ai/threats/technologies/fast-jwt"><img src="https://junglewise.ai/threats/technologies/fast-jwt/badge.svg" alt="fast-jwt (npm) vulnerabilities" /></a>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, and this page as text at https://junglewise.ai/threats/technologies/fast-jwt.md, 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, 13 November 2026.