Arbitrary Code Execution Vulnerability in GitLab CE/EE
CVE-2026-89078

9.9CRITICAL

Key Information:

Vendor

Gitlab
Status
Gitlab
Vendor
CVE Published:
23 September 2026

What is CVE-2026-89078?

A vulnerability in GitLab CE/EE allows an authenticated user to execute arbitrary code on the server under certain conditions. This issue arises from a double free memory error when parsing specially crafted regular expressions in a CI/CD configuration. The flaw affects specific versions of GitLab CE/EE, which have been patched to prevent this exploit.

Affected Version(s)

GitLab 19.2 < 19.2.7

GitLab 19.3 < 19.3.3

GitLab 19.4 < 19.4.1

References

https://gitlab.com/gitlab-org/gitlab/-/work_items/628577
https://hackerone.com/reports/4019059
technical-descriptionexploitpermissions-required
https://docs.gitlab.com/releases/patches/patch-release-gi...

CVSS V3.1

Score:
9.9
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Thanks [joaxcar](https://hackerone.com/joaxcar) for reporting this vulnerability through our HackerOne bug bounty program
.