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.
History

Sat, 05 Sep 2026 10:15:00 +0000

Type Values Removed Values Added
Description 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.
Title Coolify through 4.3.17 OAuth Account Takeover via Unverified Email Matching
First Time appeared Coollabs
Coollabs coolify
Weaknesses CWE-287
CPEs cpe:2.3:a:coollabs:coolify:*:*:*:*:*:*:*:*
Vendors & Products Coollabs
Coollabs coolify
References
Metrics cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 9.2, 'vector': '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'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published: 2026-09-05T09:59:07.349Z

Updated: 2026-09-05T09:59:07.349Z

Reserved: 2026-09-05T01:59:21.369Z

Link: CVE-2026-86117

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2026-09-05T10:16:42.860

Modified: 2026-09-09T20:20:21.673

Link: CVE-2026-86117

cve-icon Redhat

No data.