CVE-2026-1458
Published: 11 February 2026
Summary
CVE-2026-1458 is a medium-severity Allocation of Resources Without Limits or Throttling (CWE-770) vulnerability in Gitlab Gitlab. Its CVSS base score is 6.5 (Medium).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 11.8th 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 SI-10 (Information Input Validation).
Deeper analysis
CVE-2026-1458 is a denial-of-service vulnerability in GitLab Community Edition (CE) and Enterprise Edition (EE), affecting all versions from 8.0 prior to 18.6.6, 18.7 prior to 18.7.4, and 18.8 prior to 18.8.4. The issue stems from CWE-770 (Allocation of Resources Without Limits or Throttling) and CWE-434 (Unrestricted Upload of File with Dangerous Type), allowing malicious file uploads under certain conditions to trigger resource exhaustion. It has a CVSS v3.1 base score of 6.5 (AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H), indicating medium severity with high impact on availability.
An attacker with low privileges (PR:L per CVSS, though described as potentially unauthenticated under specific conditions) can exploit this remotely over the network with low complexity and no user interaction required. By uploading specially crafted malicious files, the attacker triggers a denial-of-service condition, consuming excessive server resources and disrupting service availability for legitimate users without impacting confidentiality or integrity.
GitLab has remediated the vulnerability through patch releases, including GitLab 18.8.4 as detailed in their release notes. Security practitioners should upgrade affected instances to GitLab 18.6.6, 18.7.4, 18.8.4, or later versions. Additional details are available in the GitLab issue tracker (gitlab.com/gitlab-org/gitlab/-/issues/587698) and the originating HackerOne report (hackerone.com/reports/3517644).
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-7046
Vulnerability details
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 8.0 before 18.6.6, 18.7 before 18.7.4, and 18.8 before 18.8.4 that, under certain conditions could have allowed an unauthenticated user to cause denial of service by uploading malicious…
more
files.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
CVE enables remote exploitation of public-facing GitLab app (T1190) via malicious uploads, directly causing application DoS through resource exhaustion (T1499.004).
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly requires mechanisms to protect against resource exhaustion caused by malicious file uploads that trigger uncontrolled allocation (CWE-770).
Enforces validation of uploaded files to block dangerous or specially crafted content (CWE-434) before it can consume server resources.
Limits allocation and availability of system resources so that a single upload cannot exhaust capacity and produce denial of service.