CVE-2026-103276
Ghost before 6.20.0 File Read via URL Encoding Bypass
- State
- Published
- Severity
- 6.9 Medium
- Published
- Oct 1, 2026
- Updated
- Oct 1, 2026
- Reserved
- Sep 30, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.9 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 5.3 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N | VulnCheck |
Weaknesses
- CWE-173 Improper Handling of Alternate Encoding
Affected Products
| Product | Versions |
|---|---|
GhostTryGhost |
|
References
- GitHub Security Advisory (GHSA-6v8p-3jx9-8chr)vendor-advisory
- VulnCheck Advisory: Ghost before 6.20.0 File Read via URL Encoding Bypassthird-party-advisory
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