CVE
CVE-2026-1090
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab
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.
Package Versions Affected
Package Version
patch Availability
No items found.
Automatically patch vulnerabilities without upgrading
Fix Without Upgrading
Detect compatible fix
Apply safe remediation
Fix with a single pull request
CVSS Version
Severity
Base Score
CVSS Version
Score Vector
C
H
U
8.7
-
3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
C
H
U
-
Related Resources
No items found.
References
https://about.gitlab.com/releases/2026/03/11/patch-release-gitlab-18-9-2-released/, https://gitlab.com/gitlab-org/gitlab/-/work_items/586478, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/1xxx/CVE-2026-1090.json, https://nvd.nist.gov/vuln/detail/CVE-2026-1090, https://hackerone.com/reports/3502450, git://git@gitlab.com:gitlab-org/gitlab.git
Basic Information
Ecosystem
