CVE-2026-89078

EUVD-2026-85736
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 19.2 before 19.2.7, 19.3 before 19.3.3, and 19.4 before 19.4.1 that under certain conditions could have allowed an authenticated user to execute arbitrary code on the GitLab server due to a double free issue when parsing a specially crafted regular expression in a CI/CD configuration.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
9.9 CRITICAL
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L
Base Score
CVSS 3.x
EPSS Score
Percentile: 44.54%
Affected Products (NVD)
VendorProductVersion
gitlabgitlab
19.2.0 ≤
𝑥
< 19.2.7
gitlabgitlab
19.3.0 ≤
𝑥
< 19.3.3
gitlabgitlab
19.4.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
ruby3.1
bookworm
vulnerable
bookworm (security)
vulnerable
ruby3.3
forky
vulnerable
sid
vulnerable
trixie
vulnerable
trixie (security)
3.3.13-0+deb13u1
fixed
Common Weakness Enumeration
Vulnerability Media Exposure
References
https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-4-1-released/
https://gitlab.com/gitlab-org/gitlab/-/work_items/628577
https://hackerone.com/reports/4019059
https://www.ruby-lang.org/en/news/2026/10/23/regexp-fixes-for-gitlab-cves/