EUVD-2026-66431
GHSA-46vv-8gc3-7xrq
Severity by source
AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N
PR:H reflects mandatory Maintainer role; S:C captures the cross-boundary terminal access to the protected environment; C:L/I:L reflect limited but real read/write impact on environment.
Primary rating from Vendor (GitLab).
CVSS VectorVendor: GitLab
Lifecycle Timeline
3DescriptionCVE.org
GitLab has remediated an issue in GitLab EE affecting all versions from 11.3 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 project Maintainer permissions could have accessed the terminal of a protected environment they were not authorized to use due to improper authorization checks.
AnalysisAI
Improper authorization in GitLab Enterprise Edition allows an authenticated project Maintainer to access the interactive terminal of a protected environment they are explicitly excluded from, bypassing environment-level access controls enforced separately from project roles. Affected versions span a wide range - all EE releases from 11.3 through 19.3.0 - meaning the exposure window is substantial across the enterprise install base. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an authenticated session with at minimum the project Maintainer role assigned within the target GitLab project - this is a significant limiting prerequisite and rules out unauthenticated or low-privilege attackers. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector (AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N) scores 5.5 Medium, which accurately reflects the privilege barrier: exploitation requires an established Maintainer role within the target project, a non-trivial prerequisite. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade GitLab EE to one of the patched releases: 19.1.7, 19.2.5, or 19.3.1, as documented in the vendor patch advisory at https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-3-1-released/. … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
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