{"cve":"CVE-2026-53514","nvd":{"published":"2026-07-15T18:16:47.683","modified":"2026-07-21T13:41:03.313","status":"Analyzed","description":"Better Auth is an authentication and authorization library for TypeScript. Prior to 1.6.11, and in 1.6.14 and later when invitation IDs can be obtained outside the invited mailbox and requireEmailVerificationOnInvitation: true is not enabled, the organization plugin's acceptInvitation, rejectInvitation, getInvitation, and listUserInvitations recipient endpoints use session.user.email and an invitation ID without sufficient verified-email ownership proof, allowing a user with an unverified session for the invited email address to accept an organization invitation after obtaining the invitation ID. This issue is fixed for the original default behavior in version 1.6.11, while 1.6.14 restored compatibility for built-in opaque invitation IDs and leaves affected configurations requiring secure options.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N","score":7.7},"cwes":["CWE-287","CWE-345","CWE-441","CWE-862"],"references":["https://github.com/better-auth/better-auth/commit/23094a628f007f801be6d26e5b15dc5fc6fc4eb8","https://github.com/better-auth/better-auth/pull/9577","https://github.com/better-auth/better-auth/releases/tag/v1.6.11","https://github.com/better-auth/better-auth/security/advisories/GHSA-fmh4-wcc4-5jm3"],"products":["better-auth:better_auth"],"source":"nvd","synced_at":"2026-10-19T22:45:36.895656543+00:00"},"epss":{"cve":"CVE-2026-53514","score":0.00201,"percentile":0.09985,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-fmh4-wcc4-5jm3","url":"https://osv.dev/vulnerability/GHSA-fmh4-wcc4-5jm3","summary":"Better Auth vulnerable to unauthorized invitation acceptance via unverified email match in organization plugin","modified":"2026-07-20T19:30:23.985099293Z","packages":[{"ecosystem":"npm","name":"better-auth","purl":"pkg:npm/better-auth","ranges":["<1.6.11"],"fixed":["1.6.11"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}