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CVE-2026-96279 is an arbitrary host-file read vulnerability in Flatpak OCI layer archive extraction. When rebasing OCI archive entry pathnames into the intended extraction directory, Flatpak did not similarly rebase hardlink targets. A crafted layer containing a hardlink with an absolute target can cause libarchive to create a link to a host-resident file within the extraction directory, exposing the target file's contents. The issue is fixed in Flatpak 1.18.1.
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No public exploit code observed for this vulnerability.
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A remotely exploitable, low-complexity vulnerability requiring no privileges or user interaction, with high potential impact to confidentiality, integrity, and availability on affected Ubuntu LTS systems. The content does not describe the underlying technical flaw.
A medium-severity Flatpak OCI-layer archive extraction flaw that permits disclosure of host-file contents through crafted absolute hardlink targets. An attacker controlling an OCI registry could exploit it when a user performs a Flatpak install or update.
A Flatpak arbitrary-host-file-read vulnerability caused by hardlink path traversal during OCI archive extraction.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.