CVE-2026-1090 — Cross-site Scripting in Gitlab

CWE-79 — Cross-site Scripting6 documents6 sources
Severity
5.4MEDIUMNVD
EPSS
0.1%
top 77.88%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
GitlabDebian GitlabGitlab CE
Timeline
PublishedMar 11

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 vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:NExploitability: 2.3 | Impact: 2.7

Affected Packages5 packages

▶CVEListV5gitlab/gitlab10.6 — 18.7.6+2
▶NVDgitlab/gitlab10.6.0 — 18.7.6+2
▶debiandebian/gitlab
▶gitlabgitlab/gitlab

🔴Vulnerability Details

2
OSV
CVE-2026-1090: GitLab has remediated an issue in GitLab CE/EE affecting all versions from 10↗2026-03-11
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GHSA
GHSA-qv6p-pfj5-mhj9: GitLab has remediated an issue in GitLab CE/EE affecting all versions from 10↗2026-03-11
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📋Vendor Advisories

2
GitLab
CVE-2026-1090: 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 h↗2026-03-11
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Debian
CVE-2026-1090: gitlab - GitLab has remediated an issue in GitLab CE/EE affecting all versions from 10.6 ...↗2026
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🕵️Threat Intelligence

1
Wiz
CVE-2026-1090 Impact, Exploitability, and Mitigation Steps | Wiz↗
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