CVE-2026-25731 · cross-distro fix matrix

CVE-2026-25731: 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-li

Affects 2 Linux releases across 2 (distro × package) combinations.

Fix per ecosystem

Each block below is a distro release where CVE-2026-25731 has a known fix. Run the listed command on that distro to remediate.

Debian bookworm

Source: Debian Security Tracker

calibre→ fixed in6.13.0+repack-2+deb12u6urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y calibre
```

Debian trixie

Source: Debian Security Tracker

calibre→ fixed in8.5.0+ds-1+deb13u2urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y calibre
```

Are YOU affected by CVE-2026-25731?

5-second check on your actual server. Reads /etc/os-release, uname -r, and the distro's package manager; matches against this same cross-source index live.

curl https://mindsparkstack.com/scan.sh | bash

Form-based quickscan View on NVD

Continuous monitoring beats manual checking

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