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6.5
GitLab: Attacker can crash your server with big responses
CVE-2026-2845
Summary
GitLab version 11.2 to 18.9 is affected. An attacker with a valid account can send a large response to crash your server. Update to version 18.7.5, 18.8.5, or 18.9.1 to fix the problem.
What to do
No fix is available yet. Check with your software vendor for updates.
Affected software
| Vendor | Product | Affected versions | Fix available |
|---|---|---|---|
| gitlab | gitlab | > 11.2.0 , <= 18.7.5 | – |
| gitlab | gitlab | > 11.2.0 , <= 18.7.5 | – |
| gitlab | gitlab | > 18.8.0 , <= 18.8.5 | – |
| gitlab | gitlab | > 18.8.0 , <= 18.8.5 | – |
| gitlab | gitlab | 18.9.0 | – |
| gitlab | gitlab | 18.9.0 | – |
Original title
An issue has been discovered in GitLab CE/EE affecting all versions from 11.2 before 18.7.5, 18.8 before 18.8.5, and 18.9 before 18.9.1 that could have allowed an authenticated user to cause denial...
Original description
An issue has been discovered in GitLab CE/EE affecting all versions from 11.2 before 18.7.5, 18.8 before 18.8.5, and 18.9 before 18.9.1 that could have allowed an authenticated user to cause denial of service by exploiting a Bitbucket Server import endpoint via repeatedly sending large responses.
nvd CVSS3.1
6.5
Vulnerability type
CWE-770
Allocation of Resources Without Limits
- https://about.gitlab.com/releases/2026/02/25/patch-release-gitlab-18-9-1-release... Release Notes Vendor Advisory
- https://gitlab.com/gitlab-org/gitlab/-/work_items/570554 Broken Link
Published: 25 Feb 2026 · Updated: 12 Mar 2026 · First seen: 6 Mar 2026