Raw vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:NSummary
CVE-2026-13151 is a low-severity Incorrect Authorization (CWE-863) vulnerability in Gitlab Gitlab. Its CVSS base score is 2.7 (Low).
Operationally, exploitation aligns with the MITRE ATT&CK technique Group Policy Modification (T1484.001); ranked at the 7th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified map to AC-3 (Access Enforcement) and AC-6 (Least Privilege) — see the control section below for these in your framework.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-42403
Vulnerability Data
GitLab has remediated an issue in GitLab EE affecting all versions from 16.10 before 18.11.7, 19.0 before 19.0.4, and 19.1 before 19.1.2 that under certain conditions could have allowed an authenticated user to modify group-level settings beyond their intended permissions…
more
due to improper authorization controls.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Improper authorization (CWE-863) at the group level allows an authenticated user to modify group-level settings beyond intended permissions, which aligns with Group Policy Modification (T1484.001) in the context of GitLab group configuration controls.
CVEs Like This One
Affected Assets
Mitigating Controls
Control response
Mitigating Controls (NIST 800-53 r5) AI
Directly enforces that only authorized users may modify group-level settings, preventing the improper authorization bypass described in CVE-2026-13151.
Restricts each authenticated user to the minimum privileges required, blocking the ability to alter group settings beyond their assigned role.
Ensures access-control decisions for group settings are made by an authoritative policy engine rather than relying on potentially flawed local checks.
Mitigating Controls (NIST CSF 2.0) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.
Defining, enforcing, and reviewing access authorizations and least privilege directly prevents incorrect authorization checks.
Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.
Requiring consistency between access rights and classification plus formal approval steps ensures that the authorization logic correctly distinguishes between entities that should and should not be granted access.
Enforcing policy-driven approval and role-change reviews stops incorrect or stale authorization decisions from remaining in effect after job changes or terminations.
By tying access rights to identity, device, location and classification, the control reduces the likelihood that an authorization decision will be based on an incorrect or bypassed policy.