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Vulnerability details: VCID-ppxj-pz4f-bqdj
Vulnerability ID VCID-ppxj-pz4f-bqdj
Aliases GHSA-9gxv-x7rp-r2hc
Summary gree/jose - "None" Algorithm treated as valid in tokens 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).
Status Published
Exploitability 0.5
Weighted Severity 9.0
Risk 4.5
Affected and Fixed Packages Package Details
Weaknesses (2)
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
generic_textual CRITICAL https://auth0.com/blog/2015/03/31/critical-vulnerabilities-in-json-web-token-libraries
generic_textual CRITICAL https://auth0.com/blog/critical-vulnerabilities-in-json-web-token-libraries
cvssv3.1_qr CRITICAL https://github.com/advisories/GHSA-9gxv-x7rp-r2hc
generic_textual CRITICAL https://github.com/FriendsOfPHP/security-advisories/blob/master/gree/jose/2016-08-30.yaml
generic_textual CRITICAL https://github.com/nov/jose-php
Reference id Reference type URL
https://auth0.com/blog/2015/03/31/critical-vulnerabilities-in-json-web-token-libraries
https://auth0.com/blog/critical-vulnerabilities-in-json-web-token-libraries
https://github.com/FriendsOfPHP/security-advisories/blob/master/gree/jose/2016-08-30.yaml
https://github.com/nov/jose-php
GHSA-9gxv-x7rp-r2hc https://github.com/advisories/GHSA-9gxv-x7rp-r2hc
No exploits are available.

No EPSS data available for this vulnerability.

Date Actor Action Source VulnerableCode Version
2026-06-04T16:21:40.201091+00:00 GitLab Importer Import https://gitlab.com/gitlab-org/advisories-community/-/blob/main/packagist/gree/jose/GHSA-9gxv-x7rp-r2hc.yml 38.6.0