Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Lifecycle Timeline
4DescriptionCVE.org
GitLab has remediated an issue in GitLab EE affecting all versions from 11.3 before 18.8.9, 18.9 before 18.9.5, and 18.10 before 18.10.3 that could have allowed an authenticated user with developer-role permissions to modify protected environment settings due to improper authorization checks in the API.
AnalysisAI
GitLab EE versions 11.3 through 18.10.2 allow authenticated developers to modify protected environment settings through improper authorization checks in the API, enabling privilege escalation within project scope. The vulnerability requires valid developer credentials and network access but allows an attacker to alter security-critical environment configurations without appropriate permissions. CVSS 4.3 (low severity) reflects limited scope and integrity-only impact; no public exploit or active exploitation via CISA KEV has been confirmed.
Technical ContextAI
The vulnerability stems from CWE-863 (Incorrect Authorization), a category covering failures to enforce proper access control checks. GitLab's API endpoints for protected environment management did not properly validate that the authenticated user held sufficient role permissions (specifically, the authorization logic failed to restrict modifications to users above developer role). Protected environments in GitLab are security boundaries used to control deployment access; the API failed to replicate frontend role-based access controls (RBAC) on the backend. The affected component is GitLab EE (Enterprise Edition), which implements advanced RBAC features; Community Edition versions are not affected. The improper authorization occurs at the API layer, allowing developers (PR:L in CVSS vector) to perform actions intended only for Maintainer or Owner roles.
RemediationAI
Vendors have released patched versions: upgrade GitLab EE to 18.8.9, 18.9.5, or 18.10.3 (or later). The patch restores proper authorization checks in the protected environment API endpoints, ensuring only Maintainer and Owner roles may modify these settings. Organizations unable to upgrade immediately should audit protected environment modification logs (available in GitLab EE audit logs) to identify any unauthorized changes by developer-role users and revert settings if needed. Implement additional network-level access controls to limit API access to trusted networks. For detailed remediation and verification, consult the official GitLab security advisory at https://about.gitlab.com/releases/2026/04/08/patch-release-gitlab-18-10-3-released/ and the related work item at https://gitlab.com/gitlab-org/gitlab/-/work_items/588413.
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Same weakness CWE-863 – Incorrect Authorization
View allSame technique Authentication Bypass
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External POC / Exploit Code
Leaving vuln.today
EUVD-2026-20795
GHSA-4gm7-r4jp-2xqg