CVE-2026-40354 · cross-distro fix matrix

CVE-2026-40354: It was discovered that XDG Desktop Portal incorrectly handled

Affects 2 Linux releases across 6 (distro × package) combinations. First disclosed: 2026-05-20.

Fix per ecosystem

Each block below is a distro release where CVE-2026-40354 has a known fix. Run the listed command on that distro to remediate.

Ubuntu noble

Source: Ubuntu USN

xdg-desktop-portal→ fixed in1.18.4-1ubuntu2.24.04.2USN-8287-1
```
sudo apt-get install --only-upgrade -y xdg-desktop-portal
```
xdg-desktop-portal-dev→ fixed in1.18.4-1ubuntu2.24.04.2USN-8287-1
```
sudo apt-get install --only-upgrade -y xdg-desktop-portal-dev
```
xdg-desktop-portal-tests→ fixed in1.18.4-1ubuntu2.24.04.2USN-8287-1
```
sudo apt-get install --only-upgrade -y xdg-desktop-portal-tests
```

Ubuntu questing

Source: Ubuntu USN

xdg-desktop-portal→ fixed in1.20.3+ds-1ubuntu1.1USN-8287-1
```
sudo apt-get install --only-upgrade -y xdg-desktop-portal
```
xdg-desktop-portal-dev→ fixed in1.20.3+ds-1ubuntu1.1USN-8287-1
```
sudo apt-get install --only-upgrade -y xdg-desktop-portal-dev
```
xdg-desktop-portal-tests→ fixed in1.20.3+ds-1ubuntu1.1USN-8287-1
```
sudo apt-get install --only-upgrade -y xdg-desktop-portal-tests
```

Are YOU affected by CVE-2026-40354?

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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