Cross-Site Scripting Vulnerability in Ghost from 0.5.3 to 6.50.0
CVE-2026-103292

8.6HIGH

Key Information:

Vendor

Tryghost

Status
Ghost
Vendor
CVE Published:
1 October 2026

What is CVE-2026-103292?

The vulnerability allows authenticated users with limited privileges to inject unescaped content into the JSON-LD HTML tag, which can be rendered as script content on the published page. This could potentially lead to the compromise of a staff user's admin session when they view the affected page, enabling unauthorized access and manipulation of sensitive content.

Affected Version(s)

Ghost 0.5.3 < 6.50.0

Ghost 6.50.0

References

https://github.com/TryGhost/Ghost/security/advisories/GHS...
vendor-advisory
https://www.vulncheck.com/advisories/ghost-0.5.3-before-6...
third-party-advisory

CVSS V4

Score:
8.6
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

kah-ja
.