CVE-2026-25731

EUVD-2026-5573
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.8 HIGH
LOCAL
LOW
NONE
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
GitHub_MCNA
7.8 HIGH
LOCAL
LOW
NONE
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Affected Products (NVD)
VendorProductVersion
calibre-ebookcalibre
𝑥
< 9.2.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
calibre
bookworm
no-dsa
bullseye
postponed
bullseye (security)
vulnerable
forky
vulnerable
sid
9.3.0+ds+~0.10.5-1
fixed
trixie
no-dsa
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
calibre
bionic
needs-triage
focal
needs-triage
jammy
needs-triage
noble
needs-triage
questing
needs-triage
xenial
needs-triage
Common Weakness Enumeration
References
https://github.com/kovidgoyal/calibre/commit/f0649b27512e987b95fcab2e1e0a3bcdafc23379
https://github.com/kovidgoyal/calibre/security/advisories/GHSA-xrh9-w7qx-3gcc