CVE-2026-25731

Published: Feb 6, 2026Modified: Jun 17, 2026

7.8

Vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Exploitability: 1.8 / Impact: 5.9

Source: security-advisories@github.com (Secondary)

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.

Affected (1)

Products: Calibre Ebook: Calibre

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Calibre Ebook Calibre	Before 9.2.0

Related CWEs

Improper Neutralization of Special Elements Used in a Template Engine

The product uses a template engine to insert or process externally-influenced input, but it does not neutralize or incorrectly neutralizes special elements or syntax that can be interpreted as template expressions or other code directives when processed by the engine.

References (2)

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

Source: security-advisories@github.com

Patch

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

Source: security-advisories@github.com

ExploitThird Party Advisory

Timeline

No history available yet.