Vulnerability · Published Apr 8, 2026 · Assigned by GitLab
CVE-2026-1101Improper Validation of Specified Quantity in Input in GitLab
Medium 6.5
In plain English
A medium-severity security flaw in GitLab from GitLab. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 37% of all known vulnerabilities).
Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.4%top 62.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
GitLab has remediated an issue in GitLab EE affecting all versions from 18.2 before 18.8.9, 18.9 before 18.9.5, and 18.10 before 18.10.3 that could have allowed an authenticated user to cause denial of service to the GitLab instance due to improper input validation in GraphQL queries.
Affected products (as reported)
Weakness: CWE-1284 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
References
- HackerOne Bug Bounty Report #3460228 technical-description, exploit, permissions-required
- https://gitlab.com/gitlab-org/gitlab/-/work_items/586488
- https://about.gitlab.com/releases/2026/04/08/patch-release-gitlab-18-10-3-released/