SB2026073061 - Cross-site scripting in Ghost
Published: July 30, 2026
Security Bulletin ID
SB2026073061
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Cross-site scripting (CVE-ID: CVE-2026-53950)
CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVSSv4: 2.1 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]
The vulnerability allows a remote attacker to inject arbitrary JavaScript.
The vulnerability exists due to cross-site scripting in the ActivityPub client when processing posts shared by a maliciously customised ActivityPub server. A remote attacker can share a specially crafted post to inject arbitrary JavaScript.
User interaction is required.
Remediation
Install update from vendor's website.