Ghost: Cross-Site Scripting in Universal Import

Exploitation

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

CVSS

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

EPSS

• CVE-2026-70588: 0.43% estimated exploitation activity in the next 30 days; percentile 36.99 (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 The Universal Import feature in Ghost Admin failed to properly sanitize imported content resulting in XSS in post content. Vulnerable versions This vulnerability is present in Ghost from v5.26.0 up to v6.54.0. Patches v6.54.1 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. Workarounds If upgrading immediately is not possible, avoid using the Universal Import feature. References Ghost thanks meifukun 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

4 Aug 2026, 21:03 UTC

Last modified by the source

19 Aug 2026, 02:41 UTC

Source last checked

26 Oct 2026, 13:01 UTC

1. Revision 2 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-2gx6-7gx2-wwcf

2. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-2gx6-7gx2-wwcf

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# Patch Next advisory brief: CVE-2026-70588

Advisory: Ghost: Cross-Site Scripting in Universal Import
IDs: CVE-2026-70588, GHSA-2gx6-7gx2-wwcf
Record: https://patchnext.com/advisories/cve-2026-70588 (revision 2, source checked 26 Oct 2026, 13:01 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 5.0)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: ghost 6.54.1. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm ghost: affected >= 5.26.0, < 6.54.1; fixed in 6.54.1

## 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://osv.dev/vulnerability/GHSA-2gx6-7gx2-wwcf (OSV record GHSA-2gx6-7gx2-wwcf lists affected ranges: npm ghost >=5.26.0 <6.54.1 (fixed))
- Verified: https://github.com/advisories/GHSA-2gx6-7gx2-wwcf (GitHub-reviewed advisory GHSA-2gx6-7gx2-wwcf lists affected ranges: npm ghost >=5.26.0 <6.54.1)

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