CVE-2026-110264

Integer Overflow or Wraparound in GitLab

State: Published
Severity: 10.0 Critical
Published: Oct 22, 2026
Updated: Oct 30, 2026
Reserved: Oct 13, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	10.0 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H	GitLab

Weaknesses

CWE-190 Integer Overflow or Wraparound

Affected Products

Product	Versions
GitLabGitLab	7.0 to before 18.11.13Affected 19.0 to before 19.0.10Affected 19.1 to before 19.1.9Affected 19.2 to before 19.2.9Affected 19.3 to before 19.3.6Affected 19.4 to before 19.4.3Affected 19.5 to before 19.5.1Affected

References

https://gitlab.com/gitlab-org/gitlab/-/work_items/633633
HackerOne Bug Bounty Report #4093475technical-descriptionexploitpermissions-required
https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-5-1-released/
https://www.ruby-lang.org/en/news/2026/10/23/regexp-fixes-for-gitlab-cves/

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