CVE-2026-89078
CRITICAL 9.9GitLab 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.
Severe if exploited (CVSS 9.9), but no known exploitation and low modeled probability. Patch on a normal cadence.
Exploitation likelihood
0.5%chance of exploitation in 30 days · 42nd percentile
Impact if exploited
9.9CVSS 3.1 · CRITICAL
- ConfidentialityHigh
- IntegrityHigh
- AvailabilityLow
What an attacker needs
- ✓Access: Reachable over the network — no local access needed
- ⚠Privileges: Requires a low-privilege account
- ✓User interaction: No user interaction needed
- ✓Complexity: No special conditions — reliably repeatable
✓ lowers the bar for an attacker · ⚠ raises it
Proof of concept
No public PoC is currently catalogued.
Search for new PoCs
Search GitHub now — results may be empty or unverified.
Tracked sources are checked daily for recent CVEs, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.
Data snapshot:
Weakness (CWE)
- CWE-415: : Double Free
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L
References and research data (JSON)
Known Affected Software Configurations
| Vendor | Product | Version range |
|---|---|---|
| Gitlab | Gitlab | ≥ 19.2.0 and < 19.2.7 |
| Gitlab | Gitlab | ≥ 19.2.0 and < 19.2.7 |
| Gitlab | Gitlab | ≥ 19.3.0 and < 19.3.3 |
| Gitlab | Gitlab | ≥ 19.3.0 and < 19.3.3 |
| Gitlab | Gitlab | 19.4.0 |
| Gitlab | Gitlab | 19.4.0 |
All CVSS metrics
- CRITICAL 9.9 v3.1 · CNA Primary
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L - CRITICAL 9.9 v3.1 · NVD Secondary
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L
References
Exploit-tagged references (not proof of a PoC)
- https://hackerone.com/reports/4019059 CVE record · GitLab · Updated 2026-09-23T23:05:20.132Z
NVD · CVE-2026-89078 · Updated 2026-09-28T15:22:58.227
Advisories
- https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-4-1-released/ CVE record · GitLab · Updated 2026-09-23T23:05:20.132Z
NVD · CVE-2026-89078 · Updated 2026-09-28T15:22:58.227 - https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-85736 EUVD · EUVD-2026-85736
Technical & other
- https://gitlab.com/gitlab-org/gitlab/-/work_items/628577 CVE record · GitLab · Updated 2026-09-23T23:05:20.132Z
NVD · CVE-2026-89078 · Updated 2026-09-28T15:22:58.227