# Nearform Fast-Jwt vulnerabilities

Source: https://junglewise.ai/threats/technologies/nearform-fast-jwt  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/nearform-fast-jwt.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 6 vulnerabilities in Nearform Fast-Jwt: 0 in the last 7 days and 1 in the last 90 days, 2 of them critical and 0 exploited in the wild. The most recent, CVE-2026-107720, was published on 8 October 2026. Nothing in the last four weeks, down from 1 vulnerability in the four before.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 1
- All time: 6 (2 critical, 0 exploited in the wild)

## About Nearform Fast-Jwt

JavaScript library for high-performance JWT token signing and verification.

## Latest Nearform Fast-Jwt vulnerabilities

- [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-2026-35041: 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)

## Most severe Nearform Fast-Jwt vulnerabilities

- [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-2026-35042: 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-2026-35040: 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-2026-35041: 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)

## Vulnerabilities per week

Nothing in the last four weeks, down from 1 vulnerability in the four before.

| 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 | 1 | 0 | 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 |

## 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, "Nearform Fast-Jwt vulnerabilities", https://junglewise.ai/threats/technologies/nearform-fast-jwt, 9 November 2026.