GitLab CE/EE DoS via Input Validation, vulnerable before 18.11.3
CVE-2026-1659 Published on May 14, 2026
Allocation of Resources Without Limits or Throttling in GitLab
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 9.0 before 18.9.7, 18.10 before 18.10.6, and 18.11 before 18.11.3 that could have allowed an unauthenticated user to cause denial of service by sending specially crafted requests due to insufficient input validation.
Vulnerability Analysis
CVE-2026-1659 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Weakness Type
Allocation of Resources Without Limits or Throttling
The software allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor.
Products Associated with CVE-2026-1659
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Affected Versions
GitLab:- Version 9.0 and below 18.9.7 is affected.
- Version 18.10 and below 18.10.6 is affected.
- Version 18.11 and below 18.11.3 is affected.