CVE-2026-1090

MEDIUM EPSS 13.8%
Published Mar 11, 20263mo ago · Modified Jun 17, 20262w ago
5.4 CVSS 3.1
Medium
Find Similar
Published Mar 11, 2026 3mo ago
Last Modified Jun 17, 2026 2w ago

Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 10.6 before 18.7.6, 18.8 before 18.8.6, and 18.9 before 18.9.2 that could have allowed an authenticated user, when the `markdown_placeholders` feature flag was enabled, to inject JavaScript in a browser due to improper sanitization of placeholder content in markdown processing.

CVSS Details

Base Score
5.4
Exploitability
2.3
Impact
2.7
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction Required
Scope Changed
Confidentiality Low
Integrity Low
Availability None

Threat Intelligence

EPSS Exploit Probability
13.8% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-79 Cross-site Scripting Injection

Affected Products 6

VendorProductVersionRange
gitlabgitlab*≥10.6.0  –  <18.7.6
gitlabgitlab*≥10.6.0  –  <18.7.6
gitlabgitlab*≥18.8.0  –  <18.8.6
gitlabgitlab*≥18.8.0  –  <18.8.6
gitlabgitlab*≥18.9.0  –  <18.9.2
gitlabgitlab*≥18.9.0  –  <18.9.2

References 3

  • about.gitlab.com https://about.gitlab.com/releases/2026/03/11/patch-release-gitlab-18-9-2-released/
    Release NotesVendor Advisory
  • gitlab.com https://gitlab.com/gitlab-org/gitlab/-/work_items/586478
    Broken Link
  • hackerone.com https://hackerone.com/reports/3502450
    Permissions Required

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.