CVEvulnerability

CVE-2026-67335

6.0 MEDIUM Published 2026-08-01 Modified 2026-09-08 Official page ↗
Status
Deferred
Published
2026-08-01
Last modified
2026-09-08
Assigner
[email protected]
CVSS 4.0 ([email protected])
6.0 MEDIUM — CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1 ([email protected])
5.3 MEDIUM — CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N
Weaknesses
CWE-287

Description

better-auth versions before 1.6.2 fail to validate the OAuth state parameter against the stored nonce when using cookie-backed state storage without PKCE. Attackers can forge the state parameter and supply an attacker-controlled authorization code to create authenticated sessions bound to the attacker's external identity or persistently link attacker accounts to victim profiles.

Related

Weakness · CWE (1)

  • CWE-287 Improper Authentication weakness

References