CVE-2026-96279

medium

EUVD alias: EUVD-2026-88013

Assigned by CNA: redhat

Published 2026-09-27 · Modified 2026-09-28

Discuss on Community Propose mitigation

CVSS v3

6.5

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

CVSS v4 NEW

—

not yet in upstream

VIR risk

6.5

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.

Predictions

Exploit likelihood

75%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

Mitigation details

Source: Debian Security Tracker · View original ↗ · DFSG

CVE-2026-96279 NameCVE-2026-96279 DescriptionA 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. SourceCVE (at NVD; CERT, ENISA, LWN, oss-sec,…

CVE-2026-96279

Name	CVE-2026-96279
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.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	1144130

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
flatpak (PTS)	bookworm, bookworm (security)	1.14.10-1~deb12u2	fixed
	trixie (security), trixie	1.16.6-1~deb13u2	fixed
	forky, sid	1.18.3-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Debian Bugs
flatpak	source	bullseye	(not affected)
flatpak	source	bookworm	(not affected)
flatpak	source	trixie	(not affected)
flatpak	source	(unstable)	1.18.1-1	1144130

Notes

[trixie] - flatpak <not-affected> (Vulnerable code not present)
[bookworm] - flatpak <not-affected> (Vulnerable code not present)
[bullseye] - flatpak <not-affected> (Vulnerable code not present)
https://github.com/flatpak/flatpak/security/advisories/GHSA-9rww-v4mm-x4jg
Fixed by: https://github.com/flatpak/flatpak/commit/e6fa2f9b416ec382644694c8737dc8fbe7f07b89 (1.18.1)

Home - Debian Security - Source (Git)

Apply commands

text fix

Notes

[trixie] - flatpak <not-affected> (Vulnerable code not present)[bookworm] - flatpak <not-affected> (Vulnerable code not present)[bullseye] - flatpak <not-affected> (Vulnerable code not present)https://github.com/flatpak/flatpak/security/advisories/GHSA-9rww-v4mm-x4jgFixed by: https://github.com/flatpak/flatpak/commit/e6fa2f9b416ec382644694c8737dc8fbe7f07b89 (1.18.1)

OS impact

SUSE Affected 1 release

Version	Status	Fixed in
—	Affected	—

Debian Fixed 4 releases

Version	Status	Fixed in
trixie	Fixed	`0`
sid	Fixed	`1.18.1-1`
forky	Fixed	`1.18.1-1`
bookworm	Fixed	`0`

References

CWEs

CWE-59

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.