CVE-2026-1660
Denial of Service via Improper Input Validation in GitLab Issues Import
Publication date: 2026-04-22
Last updated on: 2026-04-23
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 18.10.0 (inc) to 18.10.4 (exc) |
| gitlab | gitlab | From 18.10.0 (inc) to 18.10.4 (exc) |
| gitlab | gitlab | From 12.3.0 (inc) to 18.9.6 (exc) |
| gitlab | gitlab | From 12.3.0 (inc) to 18.9.6 (exc) |
| gitlab | gitlab | 18.11.0 |
| gitlab | gitlab | 18.11.0 |
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 affects GitLab Community Edition and Enterprise Edition versions from 12.3 before 18.9.6, 18.10 before 18.10.4, and 18.11 before 18.11.1. Under certain conditions, an authenticated user could cause a denial of service when importing issues due to improper input validation.
How can this vulnerability impact me? :
The impact of this vulnerability is a denial of service (DoS) condition. An authenticated user could exploit improper input validation during issue import to disrupt the normal operation of the GitLab service, potentially making it unavailable to other users.
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 18.9.6 or later if you are using the 18.9 series, 18.10.4 or later for the 18.10 series, or 18.11.1 or later for the 18.11 series.
This vulnerability affects all versions from 12.3 before these fixed versions and could allow an authenticated user to cause denial of service when importing issues due to improper input validation.