low2.0
CVE-2025-71402
better-auth versions greater than 1.3.34 and before 1.4.0 contain a vulnerability in the multi-session plugin's /sign-out after-hook, which trusts raw multi-se…
Impact
better-auth versions greater than 1.3.34 and before 1.4.0 contain a vulnerability in the multi-session plugin's /sign-out after-hook, which trusts raw multi-session cookies and forwards extracted values to internalAdapter.deleteSessions without verifying the cookie signature (e.g., via getSignedCookie). An attacker can supply a forged _multi-* cookie to trigger deletion of arbitrary session tokens.
Affected products
| Product | Affected versions |
|---|---|
| Better-Auth Versions Greater Than 1.3.34 And | before 1.4.0 |
Versions were read from the advisory text. No structured product data has been published for this record yet.