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3.3
Flatpak can expose host files to sandboxed apps
published 2 days ago
Summary
The Flatpak tool on Linux can let a malicious add‑on look inside the computer’s file system and show folder contents to the sandboxed program. It also makes it impossible for a user to stop a download that another user started. Update Flatpak to the latest version to stop these behaviors.
What to do
- Update openeuler flatpak to version 1.10.2-15.oe2203sp4.
Affected software
| Ecosystem | Vendor | Product | Affected versions |
|---|---|---|---|
| openEuler:22.03-LTS-SP4 | openeuler | flatpak |
< 1.10.2-15.oe2203sp4 Fix: upgrade to 1.10.2-15.oe2203sp4
|
Original advisory text
flatpak security update
flatpak is a system for building, distributing and running sandboxed desktop applications on Linux. See https://wiki.gnome.org/Projects/SandboxedApps for more information.
Security Fix(es):
A malicious Flatpak extension can probe the host filesystem to determine what files and directories exist at arbitrary paths, and host directory listings can be disclosed to sandboxed applications using the extension. Additionally, unvalidated extension metadata can cause extension content to be mounted at unintended locations inside the sandbox.(CVE-2026-96282)
By calling org.freedesktop.Flatpak.SystemHelper.CancelPull on another user's pull, the pull is not actually cancelled but removed from internal tracking, making it impossible for the owning user to stop it. Ongoing pulls cannot be stopped.(CVE-2026-96283)
Security Fix(es):
A malicious Flatpak extension can probe the host filesystem to determine what files and directories exist at arbitrary paths, and host directory listings can be disclosed to sandboxed applications using the extension. Additionally, unvalidated extension metadata can cause extension content to be mounted at unintended locations inside the sandbox.(CVE-2026-96282)
By calling org.freedesktop.Flatpak.SystemHelper.CancelPull on another user's pull, the pull is not actually cancelled but removed from internal tracking, making it impossible for the owning user to stop it. Ongoing pulls cannot be stopped.(CVE-2026-96283)
References
- https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA... Vendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-96282 Vendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-96283 Vendor Advisory
Internet-facing
60 days
Internal
At next upgrade
- Not known to be exploited
- Needs hands-on effort to exploit (estimated)
- Gives an attacker partial control (estimated)
Timeline
Published16 Oct 2026
Updated16 Oct 2026
First seen16 Oct 2026
Sources
OESA-2026-4311 · OSV
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