Vulnerability in Tryghost Ghost
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 .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- GitHub Security Advisory (GHSA-6v8p-3jx9-8chr) (vendor-advisory)
- VulnCheck Advisory: Ghost before 6.20.0 File Read via URL Encoding Bypass (third-party-advisory)
Frequently asked questions
- What is CVE-2026-103276?
- CVE-2026-103276 is a medium-severity vulnerability in Tryghost Ghost, classified under CWE-173. CVSS score: 5.3/10. Published 2026-10-01.
- How severe is CVE-2026-103276?
- Medium severity. CVSS v3 base score is 5.3 out of 10.