TI-2026-38913 Aliases CVE-2026-53945 GHSA-ch52-px8q-f22j

Ghost: Server-side request forgery via DNS rebinding in external request handling

LOW 18CWE-367Published 2026-06-24 · Updated 2026-06-25

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: High
Impact type: —
Confidentiality · integrity · availability: None · Low · None
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 6.0.9 until 6.21.1, Ghost’s private-IP check for outbound HTTP requests could be bypassed via DNS rebinding, allowing an attacker to coerce the Ghost server into reaching hosts on internal networks through features that issue external fetches. This vulnerability is fixed in 6.21.1.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00214 11th percentileScored 2026-11-07

Fix Fixed Ghost (TryGhost): 6.21.1ghost (npm): 6.21.2

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

Vendor	Product	Affected versions	Fixed in	Status	Source
TryGhost	Ghost	6.0.9 to before 6.21.1	6.21.1	Patch available	CNA
—	ghost (npm)	6.0.9 to before 6.21.2	6.21.2	Patch available	GHSA-ch52-px8q-f22j

Ghost VendorTryGhost Affected 6.0.9 to before 6.21.1 Fixed in 6.21.1 Patch available CNA
ghost (npm) Vendor— Affected 6.0.9 to before 6.21.2 Fixed in 6.21.2 Patch available GHSA-ch52-px8q-f22j

CPE names Threatist (inferred) · 1

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

CPE	Versions	Role	Vendor
cpe:2.3:a:ghost:ghost::::::::	—	—	TryGhost

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

Remediation

Fix · CNA Ghost (TryGhost) Fixed in 6.21.1
Fix · GHSA-ch52-px8q-f22j ghost (npm) Fixed in 6.21.2 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-53945
2026-10-03 Alias added: GHSA-ch52-px8q-f22j

References

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2026-53945

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