CVE-2026-1090
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab
5.4
MEDIUM
CVSS 3.1
EPSS 0.08%
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.
How to fix CVE-2026-1090
To remediate CVE-2026-1090, upgrade the affected package to a fixed version below.
- —upgrade to 18.7.6 or later
Is CVE-2026-1090 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- >= 10.6.0, < 18.7.6, >= 18.8.0, < 18.8.6, >= 18.9.0, < 18.9.2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |