CVSS 4.0
9.2 criticalCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:NCVE-2026-86117
Critical (9.2). EPSS 0.7% chance of exploitation in the next 30 days.
Coolify through 4.3.17 contains an authentication bypass vulnerability in the OAuth callback handler that signs users into existing accounts based solely on email address without verifying provider assertions or binding OAuth identities. Attackers can register a victim's email address on any enabled OAuth provider to obtain authenticated sessions as that user, bypassing password requirements and two-factor authentication.
Severity
CVSS 3.1
8.1 highCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H- EPSS
- 0.7% chance of exploitation in the next 30 days; higher than 52% of CVEs (scores of 2026-10-31)
- CWE
- CWE-287
- Published
- Modified
- Record from
- the NVD, synced
References
- https://github.com/coollabsio/coolify
- https://github.com/coollabsio/coolify/blob/v4.3.17/app/Http/Controllers/OauthController.php
- https://github.com/coollabsio/coolify/blob/v4.3.17/routes/web.php
- https://github.com/geo-chen/oss/blob/main/coolify.md
- https://www.vulncheck.com/advisories/coolify-through-4.3.17-oauth-account-takeover-via-unverified-email-matching