CVE-2026-105643: Ghost: Stored XSS via Embed Card Previews

October 7, 2026

Embed cards in the Ghost editor could be used to bypass the fix for GHSA-8vhf-xxpj-4qrg. Any staff user, including Contributors, could store scripts in post content that ran when another staff user opened the post in the editor, possibly resulting in compromise of that user’s admin session.

Self-hosted sites should leave the new security.embedPreviewUrl config option at its default.

References

github.com/TryGhost/Ghost/security/advisories/GHSA-69qc-f5m6-889c
github.com/advisories/GHSA-69qc-f5m6-889c
github.com/penpot/penpot/security/advisories/GHSA-qvq5-c536-pmx8
nvd.nist.gov/vuln/detail/CVE-2026-105643

Code Behaviors & Features

Detect and mitigate CVE-2026-105643 with GitLab Dependency Scanning

Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Dependency Scanning using SBOM also detects vulnerabilities from proprietary advisories that this site does not include. Learn more about Dependency Scanning using SBOM →