Description
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 13.12 to 18.2.8, 18.3 to 18.3.4, and 18.4 to 18.4.2 that could make the GitLab instance unresponsive or severely degraded by sending crafted GraphQL queries requesting large repository blobs.
Affected products
gitlab: gitlab
References3
- about.gitlab.com/releases/2025/10/08/patch-release-gitlab-18-4-… Release NotesVendor Advisory
- gitlab.com/gitlab-org/gitlab/-/issues/568121 Broken Link
- hackerone.com/reports/3026555 Permissions Required
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 1% percentile: 45 · as of 9 November 2026
- CWE
- CWE-770
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.