Medium severity · published Sep 27, 2026
CVE-2026-96279
Flatpak: flatpak: path traversal issue in oci archive extraction via hardlinks
6.5
CVSS
0.4%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 37% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RH
Red Hat Enterprise Linux 10 · Red Hat
All versions, or not specified · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-96279
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-96279
vdb-entry
https://access.redhat.com/security/cve/CVE-2026-96279
issue-tracking
https://bugzilla.redhat.com/show_bug.cgi?id=2539417
github.com
https://github.com/flatpak/flatpak/security/advisories/GHSA-9rww-v4mm-x4jg
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