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GitLab EE CVE-2026-18433

| EUVDEUVD-2026-57435 MEDIUM
Incorrect Authorization (CWE-863)
2026-08-12 GitLab GHSA-3vq6-w6gp-xpph
Authentication Bypass Gitlab
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

Network-reachable GraphQL endpoint, no special conditions, but authenticated session required (PR:L); impact is read-only policy config disclosure with no integrity or availability effect.

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 - 20:07 vuln.today
Patch available
Aug 12, 2026 - 20:03 EUVD
CVE Published
Aug 12, 2026 - 19:04 cve.org
MEDIUM 4.3

DescriptionCVE.org

GitLab has remediated an issue in GitLab EE affecting all versions from 19.1 before 19.1.4 and 19.2 before 19.2.2 that under certain conditions could have allowed an authenticated user to read policy configuration belonging to a namespace they were not authorized to access, due to incorrect authorization checks in a GraphQL query.

AnalysisAI

Incorrect authorization in GitLab Enterprise Edition's GraphQL layer allows authenticated users to read policy configurations belonging to namespaces they have no authorized access to. Affected versions span GitLab EE 19.1 before 19.1.4 and 19.2 before 19.2.2. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Delivery
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Exploit
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Vulnerability AssessmentAI

Exploitation Exploitation requires an active authenticated session on the target GitLab EE instance - the CVSS vector PR:L confirms at least low-privilege authenticated access is necessary; unauthenticated access is not sufficient. … 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 the bounded impact: network-reachable, low complexity, but requiring an authenticated session with at minimum low privileges, and producing only limited confidentiality impact (read-only access to policy configuration, not credentials or source code). … 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 version 19.1.4 or 19.2.2, as documented in the vendor 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-2026-18433 vulnerability details – vuln.today
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