CVE-2026-89078 Double Free in GitLab
An authenticated user can execute arbitrary code on the GitLab server by exploiting a double free vulnerability in CI/CD configuration parsing.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-89078?
CVE-2026-89078 is a critical use after free vulnerability in Gitlab Gitlab, published on 23 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-415
Which versions are affected by CVE-2026-89078?
1 open source package ship an affected version, including gitlab. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
gitlab Bitnami | From 19.2.0 | 19.2.7, 19.3.3, 19.4.1 |
Products include Gitlab Gitlab.
How do I fix CVE-2026-89078?
Upgrade gitlab to a fixed version for your release line: 19.2.7, 19.3.3 or 19.4.1.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-89078 being exploited?
There is no known exploitation of CVE-2026-89078 in the wild and no public exploit code.
Other vulnerabilities in Gitlab Gitlab
- CVE-2026-97229 GitLab Community Edition and Enterprise Edition Integer Overflow or Wraparound
- CVE-2026-85706 GitLab Community Edition and Enterprise Edition Path Traversal
- CVE-2023-7028 GitLab Community and Enterprise Editions Improper Access Control
- CVE-2021-22205 GitLab Community and Enterprise Editions Remote Code Execution
- CVE-2021-39935 GitLab Community and Enterprise Editions Server-Side Request Forgery (SSRF)
Sources
Also known as ALPINE-CVE-2026-89078, BELL-CVE-2026-89078, BIT-gitlab-2026-89078, DEBIAN-CVE-2026-89078, GHSA-9chr-4x58-948m, MINI-2r4q-gf4h-9gcg and 12 more.