GitLab CE/EE 19.0.5/19.1<3.3 Unauth DoS via MR Discussions
CVE-2026-15975 Published on July 29, 2026
Allocation of Resources Without Limits or Throttling in GitLab
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 11.8 before 19.0.5, 19.1 before 19.1.3, and 19.2 before 19.2.1 that under certain conditions could have allowed an unauthenticated user to cause a denial of service due to insufficient resource throttling when processing merge request discussions.
Vulnerability Analysis
CVE-2026-15975 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-2026-15975
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Affected Versions
GitLab:- Version 11.8 and below 19.0.5 is affected.
- Version 19.1 and below 19.1.3 is affected.
- Version 19.2 and below 19.2.1 is affected.