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TI-2026-19979 Aliases CVE-2026-24778GHSA-gv6q-2m97-882h

Ghost vulnerable to XSS via malicious Portal preview links

Priority MEDIUM 40CWE-79Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-79.

Summary

Ghost is an open source content management system. In Ghost versions 5.43.0 through 5.12.04 and 6.0.0 through 6.14.0, an attacker was able to craft a malicious link that, when accessed by an authenticated staff user or member, would execute JavaScript with the victim's permissions, potentially leading to account takeover. Ghost Portal versions 2.29.1 through 2.51.4 and 2.52.0 through 2.57.0 were vulnerable to this issue. Ghost automatically loads the latest patch of the members Portal component via CDN. For Ghost 5.x users, upgrading to v5.121.0 or later fixes the vulnerability. v5.121.0 loads Portal v2.51.5, which contains the patch. For Ghost 6.x users, upgrading to v6.15.0 or later fixes the vulnerability. v6.15.0 loads Portal v2.57.1, which contains the patch. For Ghost installations using a customized or self-hosted version of Portal, it will be necessary to manually rebuild from or update to the latest patch version.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00287 21st percentileScored 2026-11-07
Fix Fixed ghost (npm): 5.121.0, 6.15.0@tryghost/portal (npm): 2.51.5, 2.57.1

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
TryGhostGhost@tryghost/portal >= 2.29.1, < 2.51.5; @tryghost/portal >= 2.52.0, < 2.57.1; ghost >= 5.43.0, < 5.121.0; ghost >= 6.0.0, < 6.15.0—No fix listedCNA
—ghost (npm)5.43.0 to before 5.121.05.121.0Patch availableGHSA-gv6q-2m97-882h
—@tryghost/portal (npm)2.29.1 to before 2.51.52.51.5Patch availableGHSA-gv6q-2m97-882h
—@tryghost/portal (npm)2.52.0 to before 2.57.12.57.1Patch availableGHSA-gv6q-2m97-882h
—ghost (npm)6.0.0 to before 6.15.06.15.0Patch availableGHSA-gv6q-2m97-882h
  • Ghost VendorTryGhost Affected @tryghost/portal >= 2.29.1, < 2.51.5; @tryghost/portal >= 2.52.0, < 2.57.1; ghost >= 5.43.0, < 5.121.0; ghost >= 6.0.0, < 6.15.0 Fixed in — No fix listed CNA
  • ghost (npm) Vendor— Affected 5.43.0 to before 5.121.0 Fixed in 5.121.0 Patch available GHSA-gv6q-2m97-882h
  • @tryghost/portal (npm) Vendor— Affected 2.29.1 to before 2.51.5 Fixed in 2.51.5 Patch available GHSA-gv6q-2m97-882h
  • @tryghost/portal (npm) Vendor— Affected 2.52.0 to before 2.57.1 Fixed in 2.57.1 Patch available GHSA-gv6q-2m97-882h
  • ghost (npm) Vendor— Affected 6.0.0 to before 6.15.0 Fixed in 6.15.0 Patch available GHSA-gv6q-2m97-882h

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:ghost:ghost:*:*:*:*:*:node.js:*:*5.43.0 to before 5.121.0; 6.0.0 to before 6.15.0VulnerableTryGhost
cpe:2.3:a:ghost:portal:*:*:*:*:*:node.js:*:*2.29.1 to before 2.51.5; 2.52.0 to before 2.57.1VulnerableTryGhost
  • cpe:2.3:a:ghost:ghost:*:*:*:*:*:node.js:*:* Versions 5.43.0 to before 5.121.0; 6.0.0 to before 6.15.0 Vulnerable ·TryGhost
  • cpe:2.3:a:ghost:portal:*:*:*:*:*:node.js:*:* Versions 2.29.1 to before 2.51.5; 2.52.0 to before 2.57.1 Vulnerable ·TryGhost

Remediation

  • Fix · GHSA-gv6q-2m97-882h ghost (npm) Fixed in 5.121.0 Advisory →
  • Fix · GHSA-gv6q-2m97-882h @tryghost/portal (npm) Fixed in 2.51.5 Advisory →
  • Fix · GHSA-gv6q-2m97-882h @tryghost/portal (npm) Fixed in 2.57.1 Advisory →
  • Fix · GHSA-gv6q-2m97-882h ghost (npm) Fixed in 6.15.0 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-24778
  2. 2026-10-03 Alias added: GHSA-gv6q-2m97-882h

References

Patch 1

Advisory 2

Other 1

  • 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 29 →

Sources

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