CVE-2026-73419 (GCVE-0-2026-73419)

Vulnerability from cvelistv5 – Published: 2026-08-12 20:23 – Updated: 2026-08-13 15:32
VLAI
Title
NextAuth.js: OAuth state, nonce, and PKCE check cookies are not bound to the provider that created them
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 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.
Severity
6.8 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 15:32 UTC
CWE
  • CWE-345 - Insufficient Verification of Data Authenticity
  • CWE-346 - Origin Validation Error
  • CWE-940 - Improper Verification of Source of a Communication Channel
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7820 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
nextauthjs next-auth Affected: < 4.24.15
Affected: >= 5.0.0-beta.4, < 5.0.0-beta.32
guessed Create a notification for this product.
@auth core Affected: < 0.41.3
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

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}



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