CVE-2026-110862CWE-287

CVE-2026-110862

Critical · published October 15, 2026

CVSS v3.1
9.1
EPSS
0%
Percentile
23.9
In the wild
Unconfirmed
What it is

Better Auth from 1.4.0-beta.18 before 1.7.7 contains an authentication bypass vulnerability that allows unauthenticated attackers to sign in as other users by reusing OAuth state values as Magic Link tokens. Attackers can start an OAuth sign-in with a victim's email and submit the returned state to Magic Link verification, gaining sessions or creating falsely email-verified accounts.

The record
Technical detail
CVSS v3.1
9.1 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CVSS v4.0
9.3 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
EPSS
0.00321 · 23.9th percentile
Weakness
CWE-287 · Improper Authentication
Published
2026-10-15T03:17Z
References (2)
https://github.com/better-auth/better-auth/security/advisories/GHSA-965c-763c-88jm · [email protected]https://www.vulncheck.com/advisories/better-auth-1.4.0-beta.18-before-1.7.7-authentication-bypass-via-magic-link · [email protected]
EPSS history
Timeline
  • 16 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 14 OCT 22:52Z
    Better Auth 1.4.0-beta.18 before 1.7.7 Authentication Bypass via Magic Link
    cvelistv5
  • 14 OCT 22:52Z
    Better Auth 1.4.0-beta.18 before 1.7.7 Authentication Bypass via Magic Link
    cvelistv5