{"id":"CVE-2026-42349","aliases":["GHSA-w24r-5266-9c3c"],"url":"https://o3.security/vulnerability/CVE-2026-42349","summary":"Clerk: Authorization bypass when combining organization, billing, or reverification checks","details":"Clerk JavaScript is the official JavaScript repository for Clerk authentication. has(), auth.protect(), and related authorization predicates in @clerk/shared, @clerk/nextjs, @clerk/backend, and other framework SDKs can return true for certain combined authorization checks when the result should be false, allowing a gated action to proceed for a user who does not satisfy the full set of requested conditions. This call shape can be bypassed if certain conditions are met: a has() or auth.protect() call that combines a reverification check with any of role, permission, feature, or plan, or that combines a billing check (feature or plan) with a role or permission check. This vulnerability is fixed in  @clerk/clerk-js 5.125.10 and 6.7.5.","published":"2026-05-11T16:08:27.869Z","modified":"2026-08-07T11:49:57.451955069Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"@clerk/shared","fixedVersion":"3.47.5"},{"ecosystem":"npm","name":"@clerk/shared","fixedVersion":"4.8.3"},{"ecosystem":"npm","name":"@clerk/backend","fixedVersion":"2.33.3"},{"ecosystem":"npm","name":"@clerk/backend","fixedVersion":"3.2.14"},{"ecosystem":"npm","name":"@clerk/nextjs","fixedVersion":"6.39.3"},{"ecosystem":"npm","name":"@clerk/nextjs","fixedVersion":"7.2.4"},{"ecosystem":"npm","name":"@clerk/clerk-js","fixedVersion":"5.125.10"},{"ecosystem":"npm","name":"@clerk/clerk-js","fixedVersion":"6.7.5"},{"ecosystem":"npm","name":"@clerk/clerk-react","fixedVersion":"5.61.6"},{"ecosystem":"npm","name":"@clerk/react","fixedVersion":"6.4.3"},{"ecosystem":"npm","name":"@clerk/vue","fixedVersion":"1.17.21"},{"ecosystem":"npm","name":"@clerk/vue","fixedVersion":"2.0.16"},{"ecosystem":"npm","name":"@clerk/astro","fixedVersion":"2.17.11"},{"ecosystem":"npm","name":"@clerk/astro","fixedVersion":"3.0.18"},{"ecosystem":"npm","name":"@clerk/nuxt","fixedVersion":"1.13.29"},{"ecosystem":"npm","name":"@clerk/nuxt","fixedVersion":"2.2.5"},{"ecosystem":"npm","name":"@clerk/clerk-expo","fixedVersion":"2.19.36"},{"ecosystem":"npm","name":"@clerk/expo","fixedVersion":"3.2.2"},{"ecosystem":"npm","name":"@clerk/react-router","fixedVersion":"2.4.13"},{"ecosystem":"npm","name":"@clerk/react-router","fixedVersion":"3.1.4"},{"ecosystem":"npm","name":"@clerk/tanstack-react-start","fixedVersion":"0.29.11"},{"ecosystem":"npm","name":"@clerk/tanstack-react-start","fixedVersion":"1.1.4"},{"ecosystem":"npm","name":"@clerk/chrome-extension","fixedVersion":"2.9.15"},{"ecosystem":"npm","name":"@clerk/chrome-extension","fixedVersion":"3.1.15"},{"ecosystem":"npm","name":"@clerk/fastify","fixedVersion":"2.6.31"},{"ecosystem":"npm","name":"@clerk/fastify","fixedVersion":"3.1.16"},{"ecosystem":"npm","name":"@clerk/express","fixedVersion":"1.7.79"},{"ecosystem":"npm","name":"@clerk/express","fixedVersion":"2.1.6"},{"ecosystem":"npm","name":"@clerk/hono","fixedVersion":"0.1.16"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42349.json"},{"type":"ADVISORY","url":"https://github.com/clerk/javascript/security/advisories/GHSA-w24r-5266-9c3c"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-42349"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T11:49:57.451955069Z"}}