Severity by source
AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N
Lifecycle Timeline
4DescriptionCVE.org
GitLab has remediated an issue in GitLab EE affecting all versions from 18.0.0 before 18.8.9, 18.9 before 18.9.5, and 18.10 before 18.10.3 that in Code Quality reports could have allowed an authenticated user to leak IP addresses of users viewing the report via specially crafted content.
AnalysisAI
Authenticated users can leak IP addresses of other users viewing Code Quality reports in GitLab EE through specially crafted malicious content injection. The vulnerability affects GitLab EE versions 18.0.0 through 18.10.2, requires user interaction (report viewing), and has been patched in versions 18.8.9, 18.9.5, and 18.10.3. No public exploit code or active exploitation has been confirmed; the vulnerability was discovered and reported through the GitLab responsible disclosure program.
Technical ContextAI
The vulnerability stems from improper input validation in Code Quality report rendering, classified as CWE-94 (Improper Control of Generation of Code). The root cause involves code injection within the report display mechanism that processes user-controlled content without sufficient sanitization. When a Code Quality report containing specially crafted payloads is rendered, the injection allows extraction of IP address information from viewing users. GitLab EE's Code Quality feature aggregates and displays code analysis metrics, and the vulnerability specifically affects how this feature handles and sanitizes user-provided or user-influenced content within report content. The reliance on user interaction (UI:R in the CVSS vector) indicates the attack requires a victim to actively view the malicious report.
RemediationAI
Upgrade immediately to GitLab EE version 18.8.9, 18.9.5, or 18.10.3 or later, depending on the currently deployed release series. For GitLab.com (SaaS), the patch has been automatically deployed as of the release date (April 8, 2026). Self-Managed users should apply the patch from https://about.gitlab.com/releases/2026/04/08/patch-release-gitlab-18-10-3-released/ without delay. If immediate patching is not possible, restrict access to Code Quality reports to trusted users and avoid sharing reports with external parties until the patch is applied. Review the GitLab work item (https://gitlab.com/gitlab-org/gitlab/-/work_items/587893) for technical details and validation of the fix.
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Same weakness CWE-94 – Code Injection
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External POC / Exploit Code
Leaving vuln.today
EUVD-2026-20793