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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

Original advisory

Historical advisory recorded 23 Oct 2026 15:48:27 UTC. Read the latest advisory.

cve-program · CVE-2026-86117

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-86117

Published

coolify

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "coollabsio",
                    "product": "coolify",
                    "repo": "https://github.com/coollabsio/coolify",
                    "defaultStatus": "unaffected",
                    "packageURL": "pkg:github/coollabsio/coolify",
                    "versions": [
                        {
                            "version": "0",
                            "lessThanOrEqual": "4.3.17",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON