CVE-2026-39324 · cross-distro fix matrix

CVE-2026-39324: SeungMyung Lee discovered that Rack::Session did not properly reject

Affects 2 Linux releases across 2 (distro × package) combinations. First disclosed: 2026-04-20.

Fix per ecosystem

Each block below is a distro release where CVE-2026-39324 has a known fix. Run the listed command on that distro to remediate.

Ubuntu questing

Source: Ubuntu USN

ruby-rack-session→ fixed in2.1.1-0.1ubuntu0.1USN-8190-1
```
sudo apt-get install --only-upgrade -y ruby-rack-session
```

Ubuntu resolute

Source: Ubuntu USN

ruby-rack-session→ fixed in2.1.1-0.1ubuntu0.26.04.1USN-8190-2
```
sudo apt-get install --only-upgrade -y ruby-rack-session
```

Are YOU affected by CVE-2026-39324?

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

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Continuous monitoring beats manual checking

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