Vulnerability · Published Oct 1, 2026 · Assigned by VulnCheck

CVE-2026-103291Ghost 3.20.2 before 6.51.0 SSRF via image-size fetch

Medium 6.4

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 0.1% (higher than 4% of all known vulnerabilities).

Severity (CVSS 3.1)6.4Medium

Exploit odds (30 days)0.1%top 96.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Ghost versions from 3.20.2 before 6.51.0 contain a server-side request forgery vulnerability in image dimension refetching that allows authenticated staff users to trigger outbound HTTP requests to arbitrary URLs. Attackers can point image cards at attacker-controlled hosts or internal network endpoints to access metadata services and internal resources unavailable from the public internet.

Affected products (as reported)

Vendor	Product	Versions
TryGhost	Ghost	3.20.2 – before 6.51.0

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

References

GitHub Security Advisory (GHSA-rrq6-9r3c-7w26) vendor-advisory
VulnCheck Advisory: Ghost 3.20.2 before 6.51.0 SSRF via image-size fetch third-party-advisory