EUVD-2026-50479
GHSA-86r3-q889-hvg2
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Description states unauthenticated exploitation via public MR, so PR:N overrides the provided PR:L; only confidential issue titles are disclosed, so C:L with no integrity or availability impact.
Primary rating from Vendor (GitLab).
CVSS VectorVendor: GitLab
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Lifecycle Timeline
3DescriptionCVE.org
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 8.8 before 19.0.5, 19.1 before 19.1.3, and 19.2 before 19.2.1 that under certain conditions could have allowed an unauthenticated user to view the title of a confidential issue through a publicly accessible merge request due to improper authorization checks.
AnalysisAI
Confidential issue title disclosure in GitLab CE/EE affects all versions from 8.8 through 19.2 (pre-fix), allowing unauthenticated access to sensitive issue titles via improper authorization checks on publicly accessible merge requests. An attacker who can access a public merge request linked to a confidential issue can read the confidential issue's title without any project membership or authentication. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires two specific conditions to be simultaneously true: (1) the target GitLab project must have at least one merge request that is accessible to unauthenticated users (i.e., the project is public or merge request visibility is not restricted), and (2) that merge request must reference or be linked to a confidential issue within the same project. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The official CVSS vector (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N, score 4.3) indicates a low-privilege network vector with low confidentiality impact, yielding a moderate-low score. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker identifies a GitLab project with publicly accessible merge requests and suspects or discovers that confidential issues exist on the project. Without any authentication, the attacker accesses one or more merge requests and observes confidential issue titles leaked in the merge request view - for example, a title such as 'CVE-2026-XXXX: critical auth bypass in payment module' reveals internal security work. … |
| Remediation | The primary fix is to upgrade to one of the patched versions released by GitLab: 19.0.5, 19.1.3, or 19.2.1. … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
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