CVE-2026-103271: Ghost 4.0.0 before 6.63.0 Restricted Content Bypass

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% 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-863

Description

Ghost versions from 4.0.0 before 6.63.0 contain a content API vulnerability that allows unauthenticated visitors to access gated post content. Attackers can bypass content restrictions by directly querying the content API to retrieve restricted posts without authentication.

Affected products

TryGhost Ghost: from 4.0.0 before 6.63.0 — fixed in 6.63.0

How to fix

Upgrade to a fixed version: TryGhost Ghost 6.63.0. Check the vendor advisory for mitigations.

References

https://github.com/TryGhost/Ghost/security/advisories/GHSA-rcx7-6m7p-xw5c
https://www.vulncheck.com/advisories/ghost-4.0.0-before-6.63.0-restricted-content-bypass

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