# fast-jwt (npm) vulnerabilities

Source: https://junglewise.ai/threats/technologies/fast-jwt  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 13 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/fast-jwt.json  
License: CC BY 4.0 with a link back

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.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 6
- All time: 14 (4 critical, 0 exploited in the wild)

## 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 verification](https://junglewise.ai/threats/cve-2026-107724-fast-jwt-treats-raw-public-jwk-json-as-an-hmac-secret-enabling) (high, CVSS 7.4, published 8 Oct 2026)
- [CVE-2026-107723: fast-jwt claim-validator bypass with JSON array payload](https://junglewise.ai/threats/cve-2026-107723-fast-jwt-silent-claim-validator-bypass-when-jwt-payload-is-a) (high, CVSS 8.1, published 8 Oct 2026)
- [CVE-2026-107722: fast-jwt incomplete RSA-to-HS256 algorithm confusion fix](https://junglewise.ai/threats/cve-2026-107722-fast-jwt-incomplete-patch-of-non-whitespace-key-prefix-re) (critical, CVSS 9.8, published 8 Oct 2026)
- [CVE-2026-107721: fast-jwt clockTolerance validation bypass in expiry and not-before checks](https://junglewise.ai/threats/cve-2026-107721-fast-jwt-clocktolerance-infinity-silently-bypasses-both-exp-and) (medium, CVSS 5.9, published 8 Oct 2026)
- [CVE-2026-107720: fast-jwt signature verification bypass with null/empty key](https://junglewise.ai/threats/cve-2026-107720-fast-jwt-createverifier-accepts-unsigned-jwts-when-key-is-or) (high, CVSS 7.4, published 8 Oct 2026)
- [CVE-2026-107719: fast-jwt expiration bypass in token caching](https://junglewise.ai/threats/cve-2026-107719-fast-jwt-verifier-cache-accepts-expired-jwts-without-iat) (medium, CVSS 4.2, published 8 Oct 2026)
- [CVE-2026-44351: nearform fast-jwt authentication bypass in async key resolver](https://junglewise.ai/threats/cve-2026-44351-nearform-fast-jwt-authentication-bypass-in-async-key-resolver) (critical, CVSS 9.1, published 13 May 2026)
- [CVE-2026-35041: fast-jwt ReDoS in regexp claim validation leading to CPU exhaustion](https://junglewise.ai/threats/cve-2026-35041-fast-jwt-redos-in-regexp-claim-validation-leading-to-cpu) (medium, CVSS 4.2, published 9 Apr 2026)
- [CVE-2026-35040: fast-jwt stateful RegExp causes non-deterministic claim validation](https://junglewise.ai/threats/cve-2026-35040-nearform-fast-jwt-non-deterministic-validation-in-claim-matcher) (medium, CVSS 5.3, published 9 Apr 2026)
- [CVE-2026-35042: fast-jwt crit header validation bypass](https://junglewise.ai/threats/cve-2026-35042-fast-jwt-crit-header-validation-bypass) (high, CVSS 7.5, published 6 Apr 2026)
- [CVE-2026-35039: fast-jwt cacheKeyBuilder collision identity mixup](https://junglewise.ai/threats/cve-2026-35039-fast-jwt-cachekeybuilder-collision-identity-mixup) (critical, CVSS 9.1, published 6 Apr 2026)
- [CVE-2026-34950: NearForm fast-jwt algorithm confusion via whitespace-prefixed RSA public key](https://junglewise.ai/threats/cve-2026-34950-nearform-fast-jwt-algorithm-confusion-via-whitespace-prefixed-rsa) (critical, CVSS 9.1, published 6 Apr 2026)
- [CVE-2025-30144: NearForm Fast-JWT improper iss claim validation](https://junglewise.ai/threats/cve-2025-30144-nearform-fast-jwt-improper-iss-claim-validation) (low, CVSS 3.1, published 19 Mar 2025)
- [CVE-2023-48223: fast-jwt JWT algorithm confusion](https://junglewise.ai/threats/cve-2023-48223-fast-jwt-jwt-algorithm-confusion) (low, CVSS 3.1, published 20 Nov 2023)

## Most severe fast-jwt (npm) vulnerabilities

- [CVE-2026-107722: fast-jwt incomplete RSA-to-HS256 algorithm confusion fix](https://junglewise.ai/threats/cve-2026-107722-fast-jwt-incomplete-patch-of-non-whitespace-key-prefix-re) (critical, CVSS 9.8, published 8 Oct 2026)
- [CVE-2026-44351: nearform fast-jwt authentication bypass in async key resolver](https://junglewise.ai/threats/cve-2026-44351-nearform-fast-jwt-authentication-bypass-in-async-key-resolver) (critical, CVSS 9.1, published 13 May 2026)
- [CVE-2026-34950: NearForm fast-jwt algorithm confusion via whitespace-prefixed RSA public key](https://junglewise.ai/threats/cve-2026-34950-nearform-fast-jwt-algorithm-confusion-via-whitespace-prefixed-rsa) (critical, CVSS 9.1, published 6 Apr 2026)
- [CVE-2026-35039: fast-jwt cacheKeyBuilder collision identity mixup](https://junglewise.ai/threats/cve-2026-35039-fast-jwt-cachekeybuilder-collision-identity-mixup) (critical, CVSS 9.1, published 6 Apr 2026)
- [CVE-2026-107723: fast-jwt claim-validator bypass with JSON array payload](https://junglewise.ai/threats/cve-2026-107723-fast-jwt-silent-claim-validator-bypass-when-jwt-payload-is-a) (high, CVSS 8.1, published 8 Oct 2026)
- [CVE-2026-35042: fast-jwt crit header validation bypass](https://junglewise.ai/threats/cve-2026-35042-fast-jwt-crit-header-validation-bypass) (high, CVSS 7.5, published 6 Apr 2026)
- [CVE-2026-107720: fast-jwt signature verification bypass with null/empty key](https://junglewise.ai/threats/cve-2026-107720-fast-jwt-createverifier-accepts-unsigned-jwts-when-key-is-or) (high, CVSS 7.4, published 8 Oct 2026)
- [CVE-2026-107724: fast-jwt JWK JSON HMAC secret misclassification in HS256 verification](https://junglewise.ai/threats/cve-2026-107724-fast-jwt-treats-raw-public-jwk-json-as-an-hmac-secret-enabling) (high, CVSS 7.4, published 8 Oct 2026)
- [CVE-2026-107721: fast-jwt clockTolerance validation bypass in expiry and not-before checks](https://junglewise.ai/threats/cve-2026-107721-fast-jwt-clocktolerance-infinity-silently-bypasses-both-exp-and) (medium, CVSS 5.9, published 8 Oct 2026)
- [CVE-2026-35040: fast-jwt stateful RegExp causes non-deterministic claim validation](https://junglewise.ai/threats/cve-2026-35040-nearform-fast-jwt-non-deterministic-validation-in-claim-matcher) (medium, CVSS 5.3, published 9 Apr 2026)

## Vulnerabilities per week

Nothing in the last four weeks, down from 6 vulnerabilities in the four before. 0 critical against 1.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 6 | 1 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Other npm technologies

- [openclaw (npm)](https://junglewise.ai/threats/technologies/npm-openclaw): 214 vulnerabilities
- [flowise (npm)](https://junglewise.ai/threats/technologies/flowise): 133 vulnerabilities
- [parse-server (npm)](https://junglewise.ai/threats/technologies/parse-server): 117 vulnerabilities
- [vm2 (npm)](https://junglewise.ai/threats/technologies/vm2): 111 vulnerabilities
- [electron (npm)](https://junglewise.ai/threats/technologies/electron): 77 vulnerabilities
- [ghost (npm)](https://junglewise.ai/threats/technologies/ghost): 74 vulnerabilities
- [n8n (npm)](https://junglewise.ai/threats/technologies/npm-n8n): 64 vulnerabilities
- [hono (npm)](https://junglewise.ai/threats/technologies/hono): 62 vulnerabilities
- [directus (npm)](https://junglewise.ai/threats/technologies/directus): 61 vulnerabilities
- [nocodb (npm)](https://junglewise.ai/threats/technologies/nocodb): 54 vulnerabilities
- [undici (npm)](https://junglewise.ai/threats/technologies/undici): 53 vulnerabilities
- [@budibase/server (npm)](https://junglewise.ai/threats/technologies/budibase-server): 42 vulnerabilities

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "fast-jwt (npm) vulnerabilities", https://junglewise.ai/threats/technologies/fast-jwt, 13 November 2026.