CVE-2025-13078
Denial of Service via Webhook Resource Exhaustion in GitLab
Publication date: 2026-03-25
Last updated on: 2026-03-26
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 18.9.0 (inc) to 18.9.3 (exc) |
| gitlab | gitlab | 18.10.0 |
| gitlab | gitlab | From 18.9.0 (inc) to 18.9.3 (exc) |
| gitlab | gitlab | 18.10.0 |
| gitlab | gitlab | From 16.10.0 (inc) to 18.8.7 (exc) |
| gitlab | gitlab | From 16.10.0 (inc) to 18.8.7 (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 versions from 16.10 before 18.8.7, 18.9 before 18.9.3, and 18.10 before 18.10.1. It allows an authenticated user to cause a denial of service by consuming excessive resources when processing certain webhook configuration inputs.
How can this vulnerability impact me? :
The impact of this vulnerability is a denial of service condition, which means that an attacker who is authenticated can cause the GitLab service to become unavailable or unresponsive by triggering excessive resource consumption through specially crafted webhook configurations.
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 18.8.7 or later if you are using the 16.10 to 18.8 series, version 18.9.3 or later if you are using the 18.9 series, or version 18.10.1 or later if you are using the 18.10 series.
This will prevent an authenticated user from causing a denial of service due to excessive resource consumption when processing certain webhook configuration inputs.