CVE-2026-27859 · cross-distro fix matrix

CVE-2026-27859: A mail message containing excessive amount of RFC 2231 MIME parameters causes LMTP to use too much CPU. A suitably formatted mail message causes mail delivery process to consume large amounts of CPU time. Use MTA capabilities to limit RFC 2231 MIME parameters in mail messages, or upgrade to fixed ve

Affects 4 Linux releases across 4 (distro × package) combinations.

Fix per ecosystem

Each block below is a distro release where CVE-2026-27859 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

dovecot→ fixed in1:2.3.13+dfsg1-2+deb11u3urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y dovecot
```

Debian bookworm

Source: Debian Security Tracker

dovecot→ fixed in1:2.3.19.1+dfsg1-2.1+deb12u2urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y dovecot
```

Debian trixie

Source: Debian Security Tracker

dovecot→ fixed in1:2.4.1+dfsg1-6+deb13u4urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y dovecot
```

Alpine edge

Source: Alpine secdb

dovecot→ fixed in2.4.3-r0
```
apk update && apk add --upgrade dovecot
```

Are YOU affected by CVE-2026-27859?

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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