CVE-2026-96279
Flatpak: flatpak: path traversal issue in oci archive extraction via hardlinks
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What happened?
A malicious OCI registry can hardlink arbitrary host files into the extraction directory when a user installs or updates a Flatpak application from an OCI remote, allowing disclosure of arbitrary host file contents. For system-wide installs running as root, this includes sensitive files such as /etc/shadow.
Affected software and versions
| Software | Version information | Fixed version |
|---|---|---|
| flatpakRed Hat | Default status: affected | See vendor advisory |
| flatpakRed Hat | Default status: unaffected | See vendor advisory |
| flatpakRed Hat | Default status: unaffected | See vendor advisory |
| flatpakRed Hat | Default status: unaffected | See vendor advisory |
Version information comes from the source record and can include unaffected products and exceptions. Distribution packages may contain backported fixes: an older upstream version alone does not prove a server is affected.
Is it being exploited?
This CVE was not listed in the CISA catalogue at our last retrieval. This does not establish that exploitation is absent.
How to respond
- Confirm the product, installed package version, and any configuration requirements in the vendor advisory.
- Follow the vendor’s remediation or workaround guidance in the references below. Structured fixed-version data is unavailable here; the publisher’s description may include a fix or workaround.
- Restart affected services if required, then verify the running version. Known exploitation may warrant investigation as well as patching.