PT-2026-21993 · Gitlab · Gitlab Ce/Ee

Aphantom · Published 2026-02-25 · Updated 2026-03-02 · CVE-2026-0752

Positive Technologies (AI Summary)

CVSS v3.1

8.0

High

Base vector

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

Name of the Vulnerable Software and Affected Versions GitLab CE/EE versions 16.2 through 18.7.4 GitLab CE/EE versions 18.8 through 18.8.4 GitLab CE/EE versions 18.9 through 18.9.0

Description A flaw exists in GitLab CE/EE that, under specific conditions, could allow an unauthenticated user to inject arbitrary scripts into the Mermaid sandbox UI.

Recommendations Update GitLab CE/EE to version 18.7.5 or later. Update GitLab CE/EE to version 18.8.5 or later. Update GitLab CE/EE to version 18.9.1 or later.

Exploit

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

BDU:2026-03431

BIT-GITLAB-2026-0752

CVE-2026-0752

Affected Products

Gitlab Ce/Ee

References · 13

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/0xxx/CVE-2026-0752.json · Exploit
• 🔥 https://hackerone.com/reports/3473276 · Exploit
• https://ubuntu.com/security/CVE-2026-0752 · Vendor Advisory
• https://about.gitlab.com/releases/2026/02/25/patch-release-gitlab-18-9-1-released · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-03431 · Security Note
• https://osv.dev/vulnerability/BIT-gitlab-2026-0752 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-0752 · Security Note
• https://cve.org/CVERecord?id=CVE-2026-0752 · Security Note
• https://osv.dev/vulnerability/CVE-2026-0752 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-0752 · Vendor Advisory
• https://gitlab.com/gitlab-org/gitlab/-/issues/585371 · Note
• https://twitter.com/CVEnew/status/2027099280775995557 · Twitter Post
• https://t.me/CVEtracker/45764 · Telegram Post