CVE-2026-1092
Denial of Service via JSON Input Validation in GitLab
Publication date: 2026-04-08
Last updated on: 2026-04-14
Assigner: GitLab Inc.
Description
Description
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| gitlab | gitlab | From 18.9.0 (inc) to 18.9.5 (exc) |
| gitlab | gitlab | From 18.10.0 (inc) to 18.10.3 (exc) |
| gitlab | gitlab | From 12.10.0 (inc) to 18.8.9 (exc) |
| gitlab | gitlab | From 18.10.0 (inc) to 18.10.3 (exc) |
| gitlab | gitlab | From 18.9.0 (inc) to 18.9.5 (exc) |
| gitlab | gitlab | From 12.10.0 (inc) to 18.8.9 (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 12.10 before 18.8.9, 18.9 before 18.9.5, and 18.10 before 18.10.3. It allows an unauthenticated user to cause a denial of service (DoS) by exploiting improper input validation of JSON payloads.
How can this vulnerability impact me? :
The impact of this vulnerability is a denial of service condition, meaning an attacker who is not authenticated can disrupt the availability of the GitLab service by sending specially crafted JSON payloads that are improperly validated.
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 18.8.9 or later if you are using the 18.8 branch, 18.9.5 or later if you are using the 18.9 branch, or 18.10.3 or later if you are using the 18.10 branch.
These updates address the issue that allowed an unauthenticated user to cause denial of service due to improper input validation of JSON payloads.