CVE-2026-1660
Received Received - Intake
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
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 12.3 before 18.9.6, 18.10 before 18.10.4, and 18.11 before 18.11.1 that under certain conditions could have allowed an authenticated user to cause denial of service when importing issues due to improper input validation.
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Meta Information
Published
2026-04-22
Last Modified
2026-04-23
Generated
2026-06-16
AI Q&A
2026-04-22
EPSS Evaluated
2026-06-14
NVD
CVE-2026-1660
EUVD
EUVD-2026-24959
Affected Vendors & Products
Showing 6 associated CPEs
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
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KEV
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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.
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Executive Summary

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.

Impact Analysis

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.

Mitigation Strategies

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.

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