CVE-2025-12576
Denial of Service in GitLab Webhook Response Handling
Publication date: 2026-03-11
Last updated on: 2026-03-18
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 9.3.0 (inc) to 18.7.6 (exc) |
| gitlab | gitlab | From 9.3.0 (inc) to 18.7.6 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-770 | The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability in GitLab CE/EE affects versions from 9.3 before 18.7.6, 18.8 before 18.8.6, and 18.9 before 18.9.2. Under certain conditions, it allows an authenticated user to cause a denial of service due to improper handling of webhook response data.
How can this vulnerability impact me? :
The vulnerability can lead to a denial of service (DoS) condition, meaning that an authenticated user could disrupt the normal operation of the GitLab service by exploiting improper handling of webhook response data.
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 18.7 series, 18.8.6 or later if using the 18.8 series, or 18.9.2 or later if using the 18.9 series. These versions contain the fix for the denial of service issue caused by improper handling of webhook response data.