CVE-2026-89078

Double Free in GitLab

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.

Affected

GitLab

CVSS v3.1 GITLAB

9.9 CRITICALCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L

EPSS

0.44% chance of exploitation in the next 30 days, 37th percentile

Published

2026-09-23

Updated

2026-09-25

Proof-of-concept exploits (1)

• https://hackerone.com/reports/4019059

Security advisories

• https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-4-1-released
• https://gitlab.com/gitlab-org/gitlab/-/work_items/628577

References

• CVE Record
• NVD entry