CVE-2026-25731
High
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.
SeverityHigh
CVSS7.8
Exploit probability—
ProductCalibre
PublishedFeb 6, 2026
First seenFeb 6, 2026
Weakness typeCWE-1336CWE-1336
How to fix
Update
- calibre-ebook calibre9.2.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| calibre-ebook calibre | v < 9.2.0 | 9.2.0 |
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