CVE-2026-110264: Integer Overflow or Wraparound in GitLab — Fixed versions

Summary

An issue has been discovered in GitLab CE/EE affecting all versions from 7.0 before 18.11.13, 19.0 before 19.0.10, 19.1 before 19.1.9, 19.2 before 19.2.9, 19.3 before 19.3.6, 19.4 before 19.4.3, and 19.5 before 19.5.1 that, under certain conditions, could have allowed an unauthenticated user to execute arbitrary code on the GitLab server due to integer overflow when compiling a specially crafted regular expression.

Remediation

Inventory every GitLab GitLab deployment, including staging.
Upgrade GitLab GitLab to the fixed version for your release line, listed under Affected versions.
Confirm the running version after the upgrade.

References

Advisoryhttps://docs.gitlab.com/releases/patches/patch-release-gitlab-19-5-1-released/
Referencehttps://gitlab.com/gitlab-org/gitlab/-/work_items/633633
Referencehttps://hackerone.com/reports/4093475
Referencehttps://www.ruby-lang.org/en/news/2026/10/23/regexp-fixes-for-gitlab-cves/

Version	Fixed in
7.0 – <18.11.13	18.11.13
19.0 – <19.0.10	19.0.10
19.1 – <19.1.9	19.1.9
19.2 – <19.2.9	19.2.9
19.3 – <19.3.6	19.3.6
19.4 – <19.4.3	19.4.3
19.5 – <19.5.1	19.5.1
7.0.0 – <18.11.13	18.11.13
19.0.0 – <19.0.10	19.0.10
19.1.0 – <19.1.9	19.1.9
19.2.0 – <19.2.9	19.2.9
19.3.0 – <19.3.6	19.3.6