High 7.8Published Feb 6, 2026

CVE-2026-25731Calibre Affected by Arbitrary Code Execution via Server-Side Template Injection in Calibre HTML Export

Updated under an hour ago (Oct 28, 2026, 6:23 AM ET)

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It affects kovidgoyal calibre and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for kovidgoyal calibre

Exploited in the last 30 days

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.

CVSS: 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-1336
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Feb 6, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

kovidgoyal calibre kovidgoyal:calibre (from the name)	before 9.2.0	CNA record
calibre-ebook calibre calibre-ebook:calibre	before 9.2.0	NVD

References

References

https://github.com/kovidgoyal/calibre/security/advisories/GHSA-xrh9-w7qx-3gcc	x-refsource-confirm, exploit, third-party-advisory
https://github.com/kovidgoyal/calibre/commit/f0649b27512e987b95fcab2e1e0a3bcdafc23379	x-refsource-misc, patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.