CVE-2026-86117
critical · 9.2Coolify 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.
9.2
CVSS
0.7%
EPSS (exploit prob.)
52nd
EPSS percentile
2026-09-05
Published
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/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
Weaknesses
CWE-287
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
Query this programmatically:
curl https://evil-db.io/api/v1/cve/CVE-2026-86117