{"id":"GHSA-9gxv-x7rp-r2hc","aliases":[],"title":"gree/jose - \"None\" Algorithm treated as valid in tokens","titleSource":"OSV","descriptionSource":"OSV","declaredSeverity":"CRITICAL","description":"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).","severity":"critical","score":null,"published":"2024-05-15T21:47:39.000Z","modified":"2026-07-16T19:00:22.053Z","withdrawn":false,"knownExploited":false,"affected":[{"ecosystem":"Packagist","name":"gree/jose","sources":[{"name":"OSV · GHSA-9gxv-x7rp-r2hc","url":"https://osv.dev/vulnerability/GHSA-9gxv-x7rp-r2hc"}],"ranges":[{"events":[{"introduced":"0"},{"fixed":"2.2.1"}],"type":"ECOSYSTEM"}],"versions":["0.1.0","0.1.1","0.1.3","0.1.4","0.1.5","1.0.0","1.0.1","2.0.0","2.0.1","2.1.0","2.2.0"],"fixed":["2.2.1"]}],"sourceAffected":[],"references":["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","https://github.com/nov/jose-php/compare/2.2.0...2.2.1"],"sources":[{"name":"OSV","id":"GHSA-9gxv-x7rp-r2hc","modified":"2026-07-16T19:00:22.053841153Z","url":"https://osv.dev/vulnerability/GHSA-9gxv-x7rp-r2hc"}],"assessments":[],"products":[],"remediation":[],"kev":{"status":"unavailable","checkedAt":"2026-10-28T22:15:33.378Z"},"coverage":[{"source":"NVD","status":"not-checked"},{"source":"GHSA","status":"not-checked"},{"source":"EUVD","status":"not-checked"},{"source":"EPSS","status":"not-checked"}],"evidence":[]}