CVE-2026-103276
Ghost versions before 6.20.0 contain a file extension filtering bypass vulnerability that allows unauthenticated attackers to read theme templates and metadata. Attackers can use URL encoding to bypass extension validation and access sensitive theme files.
- Published Oct 1, 2026
- CVSS 6.9 medium
- 0.2% chance of exploitation in the next 30 days (EPSS)
- A fix is available