Vulnerability · Published Aug 26, 2026 · Assigned by GitLab
CVE-2026-15387Acceptance of Extraneous Untrusted Data With Trusted Data in GitLab
Medium 4.3
In plain English
A medium-severity security flaw in GitLab from GitLab. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 12% of all known vulnerabilities).
Severity (CVSS 3.1)4.3Medium
Exploit odds (30 days)0.2%top 88.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
GitLab has remediated an issue in GitLab EE affecting all versions from 19.1 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 influenced the execution environment of Pipeline Execution Policy enforcement jobs, due to improper handling of job dependencies.
Affected products (as reported)
Weakness: CWE-349 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
References
- https://gitlab.com/gitlab-org/gitlab/-/work_items/605632
- HackerOne Bug Bounty Report #3754358 technical-description, exploit, permissions-required
- https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-3-1-released/