Vulnerability · Published Jun 24, 2026 · Assigned by GitHub_M

CVE-2026-53945Ghost: Server-side request forgery via DNS rebinding in external request handling

Medium 4.0

In plain English

A medium-severity server-side request forgery in Ghost from TryGhost. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 12% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)4.0Medium

Exploit odds (30 days)0.2%top 88.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	ghost	6.21.2	GHSA-ch52-px8q-f22j

Affected products (as reported)

Vendor	Product	Versions
TryGhost	Ghost	>= 6.0.9, < 6.21.1

Weakness: CWE-367, CWE-918 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N

References

https://github.com/TryGhost/Ghost/security/advisories/GHSA-ch52-px8q-f22j x_refsource_CONFIRM