NextAuth.js: OAuth state, nonce, and PKCE check cookies are not bound to the provider that created them

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-73419
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-12 21:17:41 UTC
Updated2026-08-12 21:17:41 UTC
DescriptionNextAuth.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.

Risk And Classification

Primary CVSS: v3.1 6.8 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

Problem Types: CWE-345 | CWE-346 | CWE-940 | CWE-345 CWE-345: Insufficient Verification of Data Authenticity | CWE-346 CWE-346: Origin Validation Error | CWE-940 CWE-940: Improper Verification of Source of a Communication Channel

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary6.8MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
3.1CNADECLARED6.8MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Nextauthjs Next-auth affected < 4.24.15 Not specified
CNA Nextauthjs Next-auth affected >= 5.0.0-beta.4, < 5.0.0-beta.32 Not specified
CNA @auth Core affected < 0.41.3 Not specified

References

ReferenceSourceLinkTags
github.com/nextauthjs/next-auth/releases/tag/[email protected] [email protected] github.com
github.com/nextauthjs/next-auth/commit/9f7a97fade9b1319bb9ac19fc9828d62e... [email protected] github.com
github.com/nextauthjs/next-auth/pull/13469 [email protected] github.com
github.com/nextauthjs/next-auth/releases/tag/@auth/[email protected] [email protected] github.com
github.com/nextauthjs/next-auth/commit/5bca2399a79ba8d116ca5179b4b1ebcd1... [email protected] github.com
github.com/nextauthjs/next-auth/releases/tag/[email protected] [email protected] github.com
github.com/nextauthjs/next-auth/security/advisories/GHSA-x445-f3h2-j279 [email protected] github.com
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