CVE-2026-25731

HIGH7.8

Calibre Affected by Arbitrary Code Execution via Server-Side Template Injection in Calibre HTML Export

Published Feb 6, 2026

Modified 3 weeks ago

Details

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.

References

WEB

https://github.com/kovidgoyal/calibre/commit/f0649b27512e987b95fcab2e1e0a3bcdafc23379

WEB

https://github.com/kovidgoyal/calibre/security/advisories/GHSA-xrh9-w7qx-3gcc

ADVISORY

https://www.cve.org/CVERecord?id=CVE-2026-25731

CVSS Analysis

CVSS v3.1

7.8

Exploitability

Attack Vector