CVE-2026-18252
Last modified
CVE-2026-18252 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. GitLab has remediated an issue in GitLab EE affecting all versions from 18.9 before 19.1.7, 19.2 before 19.2.5, and 19.3 before 19.3.1 that, under certain conditions, an authenticated user with developer-role permissions could have executed arbitrary commands in a CI context, due to the Claude agent processing configuration from a user-controlled source.. EPSS estimates a 0.34% chance of exploitation in the next 30 days.
Description
GitLab has remediated an issue in GitLab EE affecting all versions from 18.9 before 19.1.7, 19.2 before 19.2.5, and 19.3 before 19.3.1 that, under certain conditions, an authenticated user with developer-role permissions could have executed arbitrary commands in a CI context, due to the Claude agent processing configuration from a user-controlled source.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Gitlab | Gitlab | >= 18.9.0, < 19.1.7 |
| Gitlab | Gitlab | >= 19.2.0, < 19.2.5 |
| Gitlab | Gitlab | 19.3.0 |
References
- https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-3-1-released/Release Notes, Vendor Advisory
- https://gitlab.com/gitlab-org/gitlab/-/work_items/607342Issue Tracking
- https://hackerone.com/reports/3863650Permissions Required, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-18252?
How severe is CVE-2026-18252?
How do I fix CVE-2026-18252?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-18247A Cross Site Scripting (XSS) vulnerability in the Web Portal…5.3
- CVE-2026-18248@fastify/aws-lambda version 6.4.0 decorates each Fastify req…9.1
- CVE-2026-18249IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote authentica…9.9
- CVE-2026-1825The Show YouTube video plugin for WordPress is vulnerable to…6.4
- CVE-2026-18250IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote authentica…5
- CVE-2026-18251IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote attacker t…4.3
- CVE-2026-18255A flaw was found in Quay. A user configured in GLOBAL_READON…7.2
- CVE-2026-18257Improper validity period check for root issuer certificate i…5.6
- CVE-2026-18258Authorization bypass in the Line, LineTranscription, Virtual…8.8
- CVE-2026-18259Observable Timing Discrepancy vulnerability in Drupal Token …7.5
- CVE-2026-1826The OpenPOS Lite – Point of Sale for WooCommerce plugin for …6.4
- CVE-2026-18260Improper Restriction of Excessive Authentication Attempts vu…5.7
Are you affected by CVE-2026-18252?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST