Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab
Published Mar 11, 2026 · Updated Oct 23, 2026 · Also known as BIT-gitlab-2026-1090
Original summary
Normalized public record · Updated Oct 23, 2026
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab
Publisher and source text is retained separately from QFinch interpretation.
QFinch assessment
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.
Evidence: public source recordsAffected products
| Affected package, product or range | Fix status |
|---|---|
| Consult the referenced vendor advisory for affected versions. | Consult source advisory |
Matching a version is only one part of assessing exposure. QFinch has not assessed your environment on this public page.
Remediation
Apply the vendor-supported fixed release or mitigation, then verify the affected component is no longer reachable.
- Confirm the affected product and reachable code path exist in your environment.
- Apply the vendor-supported patch or mitigation from the primary advisory.
- Rescan the exact deployed revision and retain verification evidence.
Evidence coverage
- SSVC priority
- MEDIUM
- Confidence
- 10%
- Aliases
- BIT-gitlab-2026-1090
Scores appear only when corresponding evidence exists. Missing data is never interpreted as zero risk.
Sources and record history
Record history
Published Mar 11, 2026 · Last refreshed Oct 23, 2026