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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| GitLab | GitLab | 11.2 – < 18.7.5, 18.8 – < 18.8.5, 18.9 – < 18.9.1 | 18.7.5 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | gitlab | No fix yet | — |
Advisories 2
- NCSC-2026-0072 Kwetsbaarheden verholpen in GitLab NCSC-NL (Netherlands) · Feb 27, 2026
- WID-SEC-2026-0529 GitLab: Mehrere Schwachstellen BSI CERT-Bund (WID) · Feb 25, 2026