{"id":"CVE-2026-73419","title":"NextAuth.js provides authentication for Next.js","summary":"NextAuth.js provides authentication for Next.js. Prior to@auth/core 0.41.3 and next-auth 4.24.15 and 5.0.0-beta.32, Auth.js stores the OAuth/OIDC anti-CSRF checks state, nonce, and the PKCE verifier in global cookies that are not bound t…","severity":"medium","cvss":6.8,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N","cwe":["CWE-345","CWE-346","CWE-940"],"vendor":"nextauthjs","product":"next-auth","affected":["next-auth < 4.24.15","next-auth >= 5.0.0-beta.4, < 5.0.0-beta.32","core < 0.41.3"],"published":"2026-08-12","updated":"2026-09-09","sourceUpdated":"2026-09-09T20:58:37.713","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-73419","references":[{"url":"https://github.com/nextauthjs/next-auth/commit/5bca2399a79ba8d116ca5179b4b1ebcd152e7f05","label":"security-advisories@github.com"},{"url":"https://github.com/nextauthjs/next-auth/commit/9f7a97fade9b1319bb9ac19fc9828d62e0a2a852","label":"security-advisories@github.com"},{"url":"https://github.com/nextauthjs/next-auth/pull/13469","label":"security-advisories@github.com"},{"url":"https://github.com/nextauthjs/next-auth/releases/tag/@auth/core@0.41.3","label":"security-advisories@github.com"},{"url":"https://github.com/nextauthjs/next-auth/releases/tag/next-auth@4.24.15","label":"security-advisories@github.com"},{"url":"https://github.com/nextauthjs/next-auth/releases/tag/next-auth@5.0.0-beta.32","label":"security-advisories@github.com"},{"url":"https://github.com/nextauthjs/next-auth/security/advisories/GHSA-x445-f3h2-j279","label":"security-advisories@github.com"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-08-13T15:32:05.776262Z"},"ingestedAt":"2026-09-12T14:35:47.689Z","epss":0.00193,"epssPercentile":0.09246,"slug":"CVE-2026-73419","body":"## Overview\n\nNextAuth.js provides authentication for Next.js. Prior to@auth/core 0.41.3 and next-auth 4.24.15 and 5.0.0-beta.32, Auth.js stores the OAuth/OIDC anti-CSRF checks state, nonce, and the PKCE verifier in global cookies that are not bound to the provider that created them. On callback, a check value minted during a sign-in started with one provider can satisfy the callback for a different provider because the stored cookie is not verified against the callback provider's identity, including the provider ID, issuer, client ID, or redirect URI. In a multi-provider application that permits account linking while logged in, when one provider's authorization request is observable and a target provider callback can be satisfied without a PKCE verifier, an attacker can lure a victim into starting a legitimate same-origin flow and link the attacker's target-provider account to the victim's Auth.js user. The linked provider grants the attacker persistent sign-in to the victim's account, while cross-site request forgery alone is insufficient. This issue is fixed in @auth/core 0.41.3 and next-auth 4.24.15 and 5.0.0-beta.32.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":37,"depthScoreParts":{"impact":37.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}