CVE-2026-110864CWE-287

CVE-2026-110864

High · published October 15, 2026

CVSS v3.1
7.4
EPSS
0%
Percentile
20.2
In the wild
Unconfirmed
What it is

Better Auth from 1.5.0-beta.12 before 1.7.7 contains an authentication bypass vulnerability in the OAuth Proxy plugin that allows unauthenticated attackers to sign in as other users by forging encrypted profiles. When the proxy shares the global secret and cookie-stored state is used, attackers can obtain encrypted state for a fake profile with a victim's verified email to take over the account via implicit linking.

The record
Technical detail
CVSS v3.1
7.4 · HIGH
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CVSS v4.0
9.1 · CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
EPSS
0.00288 · 20.2th percentile
Weakness
CWE-287 · Improper Authentication
Published
2026-10-15T03:17Z
References (2)
https://github.com/better-auth/better-auth/security/advisories/GHSA-r4xp-prcw-77qf · [email protected]https://www.vulncheck.com/advisories/better-auth-1.5.0-beta.12-before-1.7.7-authentication-bypass-via-oauth-proxy · [email protected]
EPSS history
Timeline
  • 16 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 14 OCT 22:52Z
    Better Auth 1.5.0-beta.12 before 1.7.7 Authentication Bypass via OAuth Proxy
    cvelistv5
  • 14 OCT 22:52Z
    Better Auth 1.5.0-beta.12 before 1.7.7 Authentication Bypass via OAuth Proxy
    cvelistv5