CVE-2025-13927
Published: 22 January 2026
Summary
CVE-2025-13927 is a high-severity Allocation of Resources Without Limits or Throttling (CWE-770) vulnerability in Gitlab Gitlab. Its CVSS base score is 7.5 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 15.5th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 SC-5 (Denial-of-service Protection) and SC-6 (Resource Availability).
Deeper analysis
CVE-2025-13927 is a denial-of-service vulnerability in GitLab Community Edition (CE) and Enterprise Edition (EE), affecting all versions from 11.9 prior to 18.6.4, 18.7 prior to 18.7.2, and 18.8 prior to 18.8.2. The flaw, tracked under CWE-770 (Allocation of Resources Without Limits or Throttling), allows an unauthenticated attacker to trigger resource exhaustion by sending crafted requests containing malformed authentication data. It has a CVSS v3.1 base score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H), indicating high severity due to its network accessibility and lack of prerequisites.
An unauthenticated attacker can exploit this vulnerability remotely over the network with low complexity, requiring no privileges or user interaction. By submitting specially crafted requests with malformed authentication data, the attacker can cause excessive resource consumption on the GitLab server, leading to a denial-of-service condition that disrupts service availability for legitimate users.
GitLab has remediated the issue through patch releases, including GitLab 18.8.2, as detailed in their release notes. Security practitioners should upgrade affected instances to GitLab 18.6.4, 18.7.2, 18.8.2, or later versions. Additional details are available in the GitLab issue tracker (gitlab.com/gitlab-org/gitlab/-/issues/582737) and the originating HackerOne report (hackerone.com/reports/3439683).
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-4151
Vulnerability details
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 11.9 before 18.6.4, 18.7 before 18.7.2, and 18.8 before 18.8.2 that could have allowed an unauthenticated user to create a denial of service condition by sending crafted requests…
more
with malformed authentication data.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Unauthenticated remote exploitation of a public-facing web application (GitLab) to trigger resource exhaustion DoS via malformed input.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly implements denial-of-service protections such as resource limiting and throttling to block unauthenticated crafted requests causing resource exhaustion.
Ensures resource availability by monitoring and limiting allocation to prevent exhaustion from excessive processing of malformed authentication data.
Validates incoming requests, including malformed authentication data, to prevent improper processing that leads to resource exhaustion.