EUVD-2026-39177
GHSA-36ff-xw3f-vrx8
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Network-reachable endpoint, no credentials required, low complexity; impact is partial confidentiality only - issue reference metadata - with no integrity or availability effect.
Primary rating from Vendor (gitlab).
CVSS VectorVendor: gitlab
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Lifecycle Timeline
2DescriptionCVE.org
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 17.5 before 18.11.6, 19.0 before 19.0.3, and 19.1 before 19.1.1 that under certain conditions could have allowed an unauthenticated user to view confidential issue references on public projects due to improper authorization checks.
AnalysisAI
Confidential issue references in GitLab CE/EE public projects are exposed to unauthenticated users due to missing authorization checks (CWE-862). Affecting all GitLab versions from 17.5 through 18.11.5, 19.0.0-19.0.2, and 19.1.0, this flaw enables any unauthenticated remote attacker to retrieve references to confidential issues on public projects - potentially revealing issue IDs, titles, or internal metadata that project owners explicitly restricted. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires three concurrent conditions: (1) the GitLab instance runs an affected version (17.5-18.11.5, 19.0.0-19.0.2, or 19.1.0); (2) the target project is configured with public visibility, allowing unauthenticated access; and (3) that project contains one or more confidential issues. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 score of 5.3 Medium with vector AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N is an accurate representation of the actual risk profile. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An unauthenticated attacker scripting against a self-hosted GitLab instance enumerates public projects and queries issue reference endpoints, triggering the missing authorization check to retrieve references to confidential issues. The returned data may expose issue titles describing unpatched vulnerabilities or sensitive operational details the project team believed were restricted. … |
| Remediation | Upgrade GitLab CE/EE to one of the patched releases: 18.11.6, 19.0.3, or 19.1.1, as detailed in the vendor patch advisory at https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-1-1-released/. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-862 – Missing Authorization
View allSame technique Authentication Bypass
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External POC / Exploit Code
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