CVE-2026-25731
Calibre Affected by Arbitrary Code Execution via Server-Side Template Injection in Calibre HTML Export
- State
- Published
- Severity
- 7.8 High
- Published
- Feb 6, 2026
- Updated
- Feb 6, 2026
- Reserved
- Feb 5, 2026
Description
calibre is an e-book manager. Prior to 9.2.0, a Server-Side Template Injection (SSTI) vulnerability in Calibre's Templite templating engine allows arbitrary code execution when a user converts an ebook using a malicious custom template file via the --template-html or --template-html-index command-line options. This vulnerability is fixed in 9.2.0.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.8 High | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H | GitHub_M |
Weaknesses
- CWE-1336 Improper Neutralization of Special Elements Used in a Template Engine
Affected Products
| Product | Versions |
|---|---|
calibrekovidgoyal |
|
References
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