CVE-2026-86117
Coolify through 4.3.17 OAuth Account Takeover via Unverified Email Matching
CVSS 4.0 9.2 CRITICALCVSS 3.1 8.1 HIGHCheck source for fixed versionsKEV status unknown
cve-program · CVE-2026-86117
PublishedCoolify 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.
Read the publisher's advisoryAffected versions, risk and source history
Related advisories and sources
Publishers link these advisories through the identifiers shown below. A shared identifier or date alone does not tell you whether your software is affected or whether the advisories describe the same cause.
CVE-2026-86117 · CVE overview and exploitation status
cve-program · CVE-2026-86117
- https://github.com/geo-chen/oss/blob/main/coolify.md
- 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/coollabsio/coolify
- https://www.vulncheck.com/advisories/coolify-through-4.3.17-oauth-account-takeover-via-unverified-email-matching
Related changes
Linked by CVE identifierNo related changes are available here.