PT-2026-28064 · Gitlab · Gitlab Ce/Ee

Published 2026-03-25 · Updated 2026-03-27 · CVE-2026-3988

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions GitLab CE/EE versions 18.5 through 18.8.6 GitLab CE/EE versions 18.9 through 18.9.2 GitLab CE/EE versions 18.10 through 18.10.0

Description An issue exists in GitLab CE/EE that could allow an unauthenticated user to cause a denial of service. This occurs due to improper input validation in GraphQL request processing, potentially making the GitLab instance unresponsive.

Recommendations Update GitLab CE/EE to version 18.8.7 or later. Update GitLab CE/EE to version 18.9.3 or later. Update GitLab CE/EE to version 18.10.1 or later.

Exploit

Fix

DoS

Weakness Enumeration

CWE-407

Related Identifiers

BIT-GITLAB-2026-3988

CVE-2026-3988

Affected Products

Gitlab Ce/Ee

References · 8

• 🔥 https://hackerone.com/reports/3597342 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-3988 · Security Note
• https://about.gitlab.com/releases/2026/03/25/patch-release-gitlab-18-10-1-released · Vendor Advisory
• https://osv.dev/vulnerability/BIT-gitlab-2026-3988 · Vendor Advisory
• https://twitter.com/VulmonFeeds/status/2036907787964321931 · Twitter Post
• https://gitlab.com/gitlab-org/gitlab/-/work_items/593140 · Note
• https://twitter.com/CVEnew/status/2036911844552794144 · Twitter Post
• https://twitter.com/cyberbivash/status/2036886324335050978 · Twitter Post