Better Auth 1.5.0-beta.12 before 1.7.7 Authentication Bypass via OAuth Proxy
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.
CVE-2026-110864
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-110864
better-auth
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "better-auth",
"product": "better-auth",
"versions": [
{
"status": "affected",
"version": "1.5.0-beta.12",
"lessThan": "1.7.7",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "1.7.7",
"versionType": "semver"
}
],
"packageURL": "pkg:npm/better-auth",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-110864
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #29036 · Revision 1
- Added to Heist Feed
- Publisher date