CVE-2026-25731

PoC —

CVSS 3.1

7.8 high

EPSS

<1%p16

Published

Feb 6, 2026 (Feb 6, 2026)

Modified

Jun 17, 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.

Vendors: calibre-ebook
Products: calibre
Weakness: CWE-1336
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

NVD CVE.org GitHub PoCs EPSS (0.3%)

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