Vulnerability · Published Feb 11, 2026 · Assigned by GitLab
CVE-2026-1456Allocation of Resources Without Limits or Throttling in GitLab
Medium 6.5
In plain English
A medium-severity resource allocation without limits in GitLab from GitLab. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 37% of all known vulnerabilities).
Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.4%top 63.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.7 before 18.7.4, and 18.8 before 18.8.4 that could have allowed an unauthenticated user to cause denial of service through CPU exhaustion by submitting specially crafted markdown files that trigger exponential processing in markdown preview.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu:24.04:LTS | gitlab-agent | no fix listed | UBUNTU-CVE-2026-1456 |
| Ubuntu:25.10 | gitlab-agent | no fix listed | UBUNTU-CVE-2026-1456 |
| Ubuntu:26.04:LTS | gitlab-agent | no fix listed | UBUNTU-CVE-2026-1456 |
| Ubuntu:26.10 | gitlab-agent | no fix listed | UBUNTU-CVE-2026-1456 |
Affected products (as reported)
Weakness: CWE-770 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
References
- GitLab Issue #587688 issue-tracking, permissions-required
- HackerOne Bug Bounty Report #3517928 technical-description, exploit, permissions-required
- https://about.gitlab.com/releases/2026/02/10/patch-release-gitlab-18-8-4-released/