Critical

namshi/jose - Verification bypass

Disclosed: 17.05.2024
Updated: 11.10.2026 10:22

Several widely-used JSON Web Token (JWT) libraries, including node-jsonwebtoken, pyjwt, namshi/jose, php-jwt, and jsjwt, are affected by critical vulnerabilities that could allow attackers to bypass the verification step when using asymmetric keys (RS256, RS384, RS512, ES256, ES384, ES512).

Affected software

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Platform	Package	Vulnerable versions	Fixed in
Composer package	namshi/jose	< 2.2.0	2.2.0

References

CVSS score -

Weakness (CWE): -
Platform: Composer
Package: namshi/jose
Disclosed: 17.05.2024
Updated: 11.10.2026 10:22

Sources and licenses

OSV / GitHub Advisory Database - GHSA-4rr6-gf59-ggw5 - CC BY 4.0

Vulnerability history: namshi/jose

All published vulnerabilities of this package (Composer package), newest first. Shows whether this is a one-off slip or a package that needs watching.

Total entries: 2
First → latest: 05.2024 05.2024
Without a fix: 0
Exploited in attacks: 0

Severity breakdown

Critical 1
High 1

Disclosures per year

2024: 2
2025: 0
2026: 0

17.05.2024

namshi/jose - Verification bypass this entry

Critical ghsa-4rr6-gf59-ggw5 < 2.2.0 2.2.0
17.05.2024

namshi/jose insecure JSON Web Signatures (JWS)

High ghsa-hxhc-wmg8-xrqf < 1.1.2, >= 1.2.0, < 1.2.2, >= 2.0.0, < 2.0.3, >= 2.1.0, < 2.1.2 1.1.2, 1.2.2, 2.0.3, 2.1.2

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