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

Severity: medium (CVSS 6.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-01 · updated 2026-10-06
Weakness: CWE-918

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

TryGhost Ghost: from 3.20.2 before 6.51.0 — fixed in 6.51.0

How to fix

Upgrade to a fixed version: TryGhost Ghost 6.51.0. Check the vendor advisory for mitigations.

References

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