Read the docs
TI-2026-38911 Aliases CVE-2026-53943GHSA-62q6-4hv4-vjrw

Ghost: Cache-poisoning XSS in Ghost frontend via x-ghost-preview header

Priority MEDIUM 43CWE-524Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub.

Summary

Ghost is a Node.js content management system. From until 6.37.0, when Ghost is behind a shared caching layer that results in cached content being shared between different visitors, an unauthenticated user could send an x-ghost-preview header that altered the rendered frontend response. In affected cache configurations, that response could be stored and served to subsequent visitors requesting the same page, allowing cache poisoning of request-specific preview output. When running Ghost's frontend and admin panel on the same domain this could be used to take over staff user accounts. When running these on different domains staff accounts have no exposure. This vulnerability is fixed in 6.37.0.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00446 39th percentileScored 2026-11-07
Fix Fixed Ghost (TryGhost): 6.37.0ghost (npm): 6.37.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
TryGhostGhost4.0.0 to before 6.37.06.37.0Patch availableCNA
—ghost (npm)4.0.0 to before 6.37.06.37.0Patch availableGHSA-62q6-4hv4-vjrw
  • Ghost VendorTryGhost Affected 4.0.0 to before 6.37.0 Fixed in 6.37.0 Patch available CNA
  • ghost (npm) Vendor— Affected 4.0.0 to before 6.37.0 Fixed in 6.37.0 Patch available GHSA-62q6-4hv4-vjrw

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:ghost:ghost:*:*:*:*:*:*:*:*——TryGhost
  • cpe:2.3:a:ghost:ghost:*:*:*:*:*:*:*:* Versions — — ·TryGhost

Remediation

  • Fix · CNA Ghost (TryGhost) Fixed in 6.37.0
  • Fix · GHSA-62q6-4hv4-vjrw ghost (npm) Fixed in 6.37.0 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-53943
  2. 2026-10-03 Alias added: GHSA-62q6-4hv4-vjrw

References

Advisory 1

Other 2

  • TI-2026-21459 Ghost has a SQL Injection in its Content API CVSS 3.1CRITICAL 9.4
  • TI-2022-10277 An arbitrary file upload vulnerability in the file upload module of Ghost v4.39.0 allows… CVSS 3.1CRITICAL 9.8
  • TI-2024-22785 Ghost through 5.85.1 allows remote attackers to bypass an authentication rate-limit… CVSS 3.1CRITICAL 9.1
  • TI-2023-14843 Ghost vulnerable to disclosure of private API fields CVSS 3.1HIGH 7.5
  • TI-2025-09049 Ghost 6.0.6 - SSRF via oEmbed Bookmark CVSS 4.0MEDIUM 6.1
  • TI-2023-20918 Arbitrary file read via symlinks in Ghost CVSS 3.1MEDIUM 6.5
See all 109 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences