Ghost : Stored XSS via SVG Files in Content Imports

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

6.8 · CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

EPSS

• CVE-2026-105644: 0.32% estimated exploitation activity in the next 30 days; percentile 25.30 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Impact SVG images included in content imports were stored without sanitization. An attacker who convinced an Administrator to import a crafted file could host scripts on the site's domain, possibly resulting in compromise of staff users' admin sessions. Vulnerable versions This vulnerability is present in Ghost from v4.0.0 up to v6.65.0. Patches v6.67.0 contains a fix for this issue. How to update For self-hosters using Docker, find Docker's official Ghost image here. Updating a Docker-based Ghost instance is documented here. If your Ghost is a Ghost-CLI install see our documentation on updating it to the latest version here. References Ghost thanks Zhixi "Jace" Sun, independent security researcher, for disclosing this vulnerability responsibly. For more information If you have any questions or comments about this advisory, email us at security@ghost.org.

Published by the source

7 Oct 2026, 20:43 UTC

Last modified by the source

13 Oct 2026, 08:25 UTC

Source last checked

26 Oct 2026, 13:07 UTC

1. Revision 3 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-hqq2-xqr2-fmx2

2. Revision 2 · amended · 24 Oct 2026

   Amended from osv record GHSA-hqq2-xqr2-fmx2

3. Revision 1 · created · 23 Oct 2026

   Published from ghsa record GHSA-hqq2-xqr2-fmx2

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# Patch Next advisory brief: CVE-2026-105644

Advisory: Ghost : Stored XSS via SVG Files in Content Imports
IDs: CVE-2026-105644, GHSA-hqq2-xqr2-fmx2
Record: https://patchnext.com/advisories/cve-2026-105644 (revision 3, source checked 26 Oct 2026, 13:07 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 6.8)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: ghost 6.67.0. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm ghost: affected >= 4.0.0, < 6.67.0; fixed in 6.67.0

## Suggested inspection (read-only)
- `npm ls ghost --all`: lists every installed copy and version, including transitive ones. Run in the project root after `npm ci`.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on ghost.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-hqq2-xqr2-fmx2 (GitHub-reviewed advisory GHSA-hqq2-xqr2-fmx2 lists affected ranges: npm ghost >=4.0.0 <6.67.0)
- Verified: https://osv.dev/vulnerability/GHSA-hqq2-xqr2-fmx2 (OSV record GHSA-hqq2-xqr2-fmx2 lists affected ranges: npm ghost >=4.0.0 <6.67.0 (fixed))

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