CVE-2025-14513
Denial of Service via JSON Input Validation in GitLab API
Publication date: 2026-03-11
Last updated on: 2026-03-13
Assigner: GitLab Inc.
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| gitlab | gitlab | From 18.8.0 (inc) to 18.8.6 (exc) |
| gitlab | gitlab | From 18.9.0 (inc) to 18.9.2 (exc) |
| gitlab | gitlab | From 18.8.0 (inc) to 18.8.6 (exc) |
| gitlab | gitlab | From 18.9.0 (inc) to 18.9.2 (exc) |
| gitlab | gitlab | From 16.11.0 (inc) to 18.7.6 (exc) |
| gitlab | gitlab | From 16.11.0 (inc) to 18.7.6 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-1284 | The product receives input that is expected to specify a quantity (such as size or length), but it does not validate or incorrectly validates that the quantity has the required properties. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability in GitLab CE/EE affects multiple versions before certain fixed releases. It allows an unauthenticated user to cause a denial of service (DoS) condition by sending specially crafted JSON payloads to the protected branches API. The issue arises due to improper input validation when processing these payloads.
How can this vulnerability impact me? :
The vulnerability can impact you by allowing an attacker who is not authenticated to disrupt the availability of your GitLab service. Specifically, it can cause a denial of service condition, potentially making the protected branches API or the GitLab instance unavailable or unstable.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
To mitigate this vulnerability, you should upgrade GitLab CE/EE to a fixed version. Specifically, update to version 18.7.6 or later if you are using the 16.11 to 18.7 series, 18.8.6 or later if you are using the 18.8 series, or 18.9.2 or later if you are using the 18.9 series.