CVE-2026-92162 Flatpak vulnerable to path traversal via unvalidated "arch" parameter in DeployAppstream
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-92162?
CVE-2026-92162 is a high-severity vulnerability in flatpak, published on 20 Oct 2026.
Official description
Flatpak is a system for building, distributing, and running sandboxed desktop applications on Linux. Prior to version 1.18.1, on systems where at least one OCI remote is configured (most common on Fedora systems), a malicious local user in an active local session could use a crafted architecture name to trick the `flatpak-system-helper` process into creating a root-owned directory tree with contents determined by the OCI remote, plus a root-owned `lock` file and `icons` directory, outside the intended root directory. If this vulnerability is combined with other vulnerabilities also fixed in 1.18.1, the combination can lead to local root privilege escalation. This particular vulnerability is not believed to be exploitable if there are no OCI remotes configured (common on non-Fedora systems). Version 1.18.1 patches the issue.
Weakness: CWE-22
Which versions are affected by CVE-2026-92162?
How do I fix CVE-2026-92162?
Upgrade to a fixed version.
Is CVE-2026-92162 being exploited?
There is no known exploitation of CVE-2026-92162 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as DEBIAN-CVE-2026-92162, GHSA-v2gw-v9h5-9q4x, UBUNTU-CVE-2026-92162.