CVE-2026-27882 — Coolify: Timing Attack in GitLab Webhook Token Validation
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…
Published: 2026-06-30 · CVSS: 4.8 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7