Actively exploited · Published Oct 13, 2026 · Assigned by GitLab
CVE-2026-97229Integer Overflow or Wraparound in GitLab
Critical 10.0 Exploited
In plain English
A critical-severity integer overflow in GitLab from GitLab. Attackers are actively exploiting it in the wild (listed by CISA on October 29, 2026). The chance it is exploited in the next 30 days is estimated at 65.2% (higher than 99.3% of all known vulnerabilities). Ready-made attack tooling exists: Metasploit, Nuclei, public proof-of-concept code. Fixed versions are available - upgrade the affected package.
CISA guidance
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Federal agencies must remediate by Nov 1, 2026.
Official description
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 19.2 before 19.2.8, 19.3 before 19.3.5, and 19.4 before 19.4.2 that, under certain conditions, could have allowed an unauthenticated user to execute arbitrary code on the GitLab server via a specially crafted regular expression in a CI/CD configuration, due to insufficient regular expression validation.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.21 | ruby | 3.3.13-r0 | ALPINE-CVE-2026-97229 |
| Alpine:v3.22 | ruby | 3.4.12-r0 | ALPINE-CVE-2026-97229 |
| Alpine:v3.23 | ruby | 3.4.12-r0 | ALPINE-CVE-2026-97229 |
| Alpine:v3.24 | ruby | 3.4.12-r0 | ALPINE-CVE-2026-97229 |
| Debian:12 | ruby3.1 | no fix listed | DEBIAN-CVE-2026-97229 |
| Debian:13 | ruby3.3 | 3.3.13-0+deb13u1 | DEBIAN-CVE-2026-97229 |
| Debian:14 | ruby3.3 | no fix listed | DEBIAN-CVE-2026-97229 |
Affected products (as reported)
Weakness: CWE-190 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
References
- https://gitlab.com/gitlab-org/gitlab/-/work_items/630686
- HackerOne Bug Bounty Report #4055749 technical-description, exploit, permissions-required
- HackerOne Bug Bounty Report #4058589 technical-description, exploit, permissions-required
- https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-4-2-released/
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-97229 government-resource
- https://github.com/rapid7/metasploit-framework/pull/22017
- https://www.ruby-lang.org/en/news/2026/10/23/regexp-fixes-for-gitlab-cves/