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GitLab EE CVE-2026-4879

| EUVDEUVD-2026-57441 MEDIUM
Missing Authorization (CWE-862)
2026-08-12 GitLab GHSA-8qfw-v7h4-gcfv
Gitlab Authentication Bypass
4.3
CVSS 3.1 · Vendor: GitLab
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Severity by source

Vendor (GitLab) PRIMARY
4.3 MEDIUM
AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
vuln.today AI
4.3 MEDIUM

Developer-role authentication required (PR:L); disclosure limited to status check config only (C:L); no integrity or availability impact applies.

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (GitLab).

CVSS VectorVendor: GitLab

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

Lifecycle Timeline

3
Analysis Generated
Aug 12, 2026 - 20:08 vuln.today
Patch available
Aug 12, 2026 - 20:03 EUVD
CVE Published
Aug 12, 2026 - 19:05 cve.org
MEDIUM 4.3

DescriptionCVE.org

GitLab has remediated an issue in GitLab EE affecting all versions from 16.0 before 19.0.6, 19.1 before 19.1.4, and 19.2 before 19.2.2 that under certain conditions could have allowed an authenticated user with developer-role permissions to view external status check configuration restricted to higher-privileged roles due to missing authorization on a merge request API endpoint.

AnalysisAI

Unauthorized disclosure of external status check configuration in GitLab Enterprise Edition allows any authenticated user holding a developer-role to read merge request API data that should be restricted to higher-privileged roles (maintainer or owner), due to a missing authorization check on the affected endpoint. Versions spanning 16.0 through 19.2.x are affected across a wide installation base. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

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Vulnerability AssessmentAI

Exploitation Exploitation requires an authenticated session with at minimum a developer-role assignment on a GitLab EE project that has external status checks configured - if no external status checks are defined on a project, there is no sensitive configuration data to disclose. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 3.1 base score of 4.3 (AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N) accurately reflects a moderate confidentiality-only, low-complexity flaw requiring low privileges. … 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 The primary fix is to upgrade GitLab EE to one of the patched releases: 19.0.6, 19.1.4, or 19.2.2, as confirmed by GitLab in the patch release advisory at https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-2-2-released/. … Detailed patch versions, workarounds, and compensating controls in full report.
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CVE-2026-4879 vulnerability details – vuln.today
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