CVE-2026-27810 · cross-distro fix matrix

CVE-2026-27810: calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. Prior to version 9.4.0, an HTTP Response Header Injection vulnerability in the calibre Content Server allows any authenticated user to inject arbitrary HTTP headers into server responses via an unsan

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

Fix per ecosystem

Each block below is a distro release where CVE-2026-27810 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-2026-27810?

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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