CVE-2026-27882
Coolify: Timing Attack in GitLab Webhook Token Validation
CVSS Score
4.8
EPSS Score
0.0%
EPSS Percentile
0th
Coolify is an open-source and self-hostable tool for managing servers, applications, and databases. Prior to 4.0.0-beta.461, the GitLab webhook endpoint uses a non-constant-time string comparison operator (!==) to validate the webhook secret token. This implementation is vulnerable to timing attacks, which could allow an attacker to gradually discover the secret token by measuring response time differences. This vulnerability is fixed in 4.0.0-beta.461.
| CWE | CWE-208 |
| Vendor | coollabsio |
| Product | coolify |
| Published | Jun 30, 2026 |
| Last Updated | Jun 30, 2026 |
Stay Ahead of the Next One
Get instant alerts for coollabsio coolify
Be the first to know when new medium vulnerabilities affecting coollabsio coolify are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None
Affected Versions
coollabsio / coolify
< 4.0.0-beta.461