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7.5
CVE-2025-12571: GitLab may be crashed by unauthenticated user
CVE-2025-12571 · published 11 months ago
Summary
All GitLab Community and Enterprise editions before the latest patches can be forced to stop working if someone sends specially crafted data. This can happen without any login, causing the service to become unavailable. Apply the newest GitLab updates as soon as possible to prevent this.
What to do
The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.
Affected software
| Vendor | Product | Affected versions |
|---|---|---|
| gitlab | gitlab |
>= 17.10.0, < 18.4.5 >= 18.5.0, < 18.5.3 18.6.0 cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:* |
Original advisory text
Allocation of Resources Without Limits or Throttling in GitLab
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 17.10 before 18.4.5, 18.5 before 18.5.3, and 18.6 before 18.6.1 that could have allowed an unauthenticated user to cause a Denial of Service condition by sending specifically crafted requests containing malicious JSON payloads.
References
- https://about.gitlab.com/releases/2025/11/26/patch-release-gitlab-18-6-1-release... Vendor Advisory
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/12xxx/CVE-2025-12571... Vendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2025-12571 Vendor Advisory
- https://gitlab.com/gitlab-org/gitlab/-/issues/579168 Third Party Advisory
- https://hackerone.com/reports/3362239 Third Party Advisory
Internet-facing
14 days
Internal
60 days
- Not known to be exploited
- Can be exploited automatically
- Gives an attacker partial control
Type
CWE-770Allocation of Resources Without Limits
Timeline
Published26 Nov 2025
Updated3 Nov 2026
First seen7 Mar 2026
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