{"id":"GHSA-qwph-4952-7xr6","summary":"jsonwebtoken vulnerable to signature validation bypass due to insecure default algorithm in jwt.verify()","details":"# Overview\n\nIn versions \u003c=8.5.1 of jsonwebtoken library, lack of algorithm definition and a falsy secret or key in the `jwt.verify()` function can lead to signature validation bypass due to defaulting to the `none` algorithm for signature verification.\n\n# Am I affected?\nYou will be affected if all the following are true in the `jwt.verify()` function:\n- a token with no signature is received\n- no algorithms are specified \n- a falsy (e.g. null, false, undefined) secret or key is passed \n\n# How do I fix it?\n \nUpdate to version 9.0.0 which removes the default support for the none algorithm in the `jwt.verify()` method. \n\n# Will the fix impact my users?\n\nThere will be no impact, if you update to version 9.0.0 and you don’t need to allow for the `none` algorithm. If you need 'none' algorithm, you have to explicitly specify that in `jwt.verify()` options.","aliases":["CVE-2022-23540"],"modified":"2026-03-11T07:48:55.172450Z","published":"2022-12-22T03:32:59Z","database_specific":{"github_reviewed_at":"2022-12-22T03:32:59Z","nvd_published_at":"2022-12-22T19:15:00Z","cwe_ids":["CWE-287","CWE-327","CWE-347"],"severity":"MODERATE","github_reviewed":true},"references":[{"type":"WEB","url":"https://github.com/auth0/node-jsonwebtoken/security/advisories/GHSA-qwph-4952-7xr6"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-23540"},{"type":"WEB","url":"https://github.com/auth0/node-jsonwebtoken/commit/e1fa9dcc12054a8681db4e6373da1b30cf7016e3"},{"type":"PACKAGE","url":"https://github.com/auth0/node-jsonwebtoken"},{"type":"WEB","url":"https://security.netapp.com/advisory/ntap-20240621-0007"}],"affected":[{"package":{"name":"jsonwebtoken","ecosystem":"npm","purl":"pkg:npm/jsonwebtoken"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"9.0.0"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/12/GHSA-qwph-4952-7xr6/GHSA-qwph-4952-7xr6.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:L"}]}