Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Calibre-Ebook | Calibre | < 9.2.0 |
Related Weaknesses (CWE)
References
- https://github.com/kovidgoyal/calibre/commit/f0649b27512e987b95fcab2e1e0a3bcdafcPatch
- https://github.com/kovidgoyal/calibre/security/advisories/GHSA-xrh9-w7qx-3gccExploitThird Party Advisory
FAQ
What is CVE-2026-25731?
CVE-2026-25731 is a vulnerability with a CVSS score of 7.8 (HIGH). 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 eboo...
How severe is CVE-2026-25731?
CVE-2026-25731 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-25731?
Check the references section above for vendor advisories and patch information. Affected products include: Calibre-Ebook Calibre.