CVE-2026-96279

EUVD-2026-88013
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.
Link Following
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
6.5 MEDIUM
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Debian logo
Debian Releases
Debian Product
Codename
flatpak
bookworm
1.14.10-1~deb12u2
fixed
bookworm (security)
1.14.10-1~deb12u2
fixed
bullseye
not-affected
forky
1.18.2-1
fixed
sid
1.18.3-1
fixed
trixie
1.16.6-1~deb13u2
fixed
trixie (security)
1.16.6-1~deb13u2
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
flatpak
bionic
needs-triage
focal
needs-triage
jammy
needs-triage
noble
needs-triage
resolute
needs-triage
Common Weakness Enumeration
References
https://access.redhat.com/security/cve/CVE-2026-96279
https://bugzilla.redhat.com/show_bug.cgi?id=2539417
https://github.com/flatpak/flatpak/security/advisories/GHSA-9rww-v4mm-x4jg