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TI-2026-67887 Aliases CVE-2026-105648GHSA-r7f2-6fj8-6fg2

Private IP filtering bypass in Ghost via IPv6 transition addresses

Priority LOW 19CWE-184Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-918 and the CVSS impact.

Summary

Ghost, a Node.js content management system, from 6.0.9 before 6.65.0 has an incomplete validation list (CWE-184) that lets some functionality, such as Webmentions, be abused. An unauthenticated remote attacker can make limited HTTP requests to hosts on the Ghost server's internal network in some network configurations. A successful attack returns no response data to the attacker.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

Ghost is a Node.js content management system. From 6.0.9 until 6.65.0, a validation issue allowed some functionality, such as Webmentions, to be abused by an unauthenticated user to make limited HTTP requests to hosts in the Ghost server's internal network on some network configurations. A successful attack would not result in any response data being returned. This issue is fixed in version 6.65.0.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00298 22nd percentileScored 2026-11-07
Fix Fixed Ghost (TryGhost): 6.65.0ghost (npm): 6.65.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

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

Affected products

VendorProductAffected versionsFixed inStatusSource
TryGhostGhost6.0.9 to before 6.65.06.65.0Patch availableCNA
—ghost (npm)6.0.9 to before 6.65.06.65.0Patch availableGHSA-r7f2-6fj8-6fg2
  • Ghost VendorTryGhost Affected 6.0.9 to before 6.65.0 Fixed in 6.65.0 Patch available CNA
  • ghost (npm) Vendor— Affected 6.0.9 to before 6.65.0 Fixed in 6.65.0 Patch available GHSA-r7f2-6fj8-6fg2

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

Ghost 6.65.0 fixes the issue. Upgrade the npm package ghost to version 6.65.0.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

  • Fix · CNA Ghost (TryGhost) Fixed in 6.65.0
  • Fix · GHSA-r7f2-6fj8-6fg2 ghost (npm) Fixed in 6.65.0 Advisory →

Timeline

  1. 2026-10-05 Threatist record created from CVE-2026-105648
  2. 2026-10-06 CISA SSVC decision points changed
  3. 2026-10-07 Alias added: GHSA-r7f2-6fj8-6fg2
  4. 2026-10-07 Fix available: npm/[email protected] · GHSA-r7f2-6fj8-6fg2
  5. 2026-10-07 CVSS score added · GHSA-r7f2-6fj8-6fg2
  6. 2026-10-07 Weakness changed · GHSA-r7f2-6fj8-6fg2
  7. 2026-10-07 6 new references · GHSA-r7f2-6fj8-6fg2

References

Advisory 1

Other 5

  • 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