CVE catalog

CVE-2026-96279

flatpak: CVE-2026-96279

Severity: Medium · CVSS 6.5CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Published: Aug 11, 2026, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 0.43% · Oct 25, 2026

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.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	flatpak	sid	`1.18.4-1`	fixed
Debian	flatpak	forky	`1.18.4-1`	fixed
Debian	flatpak	trixie	`1.16.6-1~deb13u2`	not affected
Debian	flatpak	trixie-security	`1.16.6-1~deb13u3`	not affected
Debian	flatpak	bookworm	`1.14.10-1~deb12u2`	not affected
Debian	flatpak	bookworm-security	`1.14.10-1~deb12u2`	not affected
Ubuntu	flatpak	pro	`1.14.4-2`	vulnerable
Ubuntu	flatpak	pro	`1.14.5-1`	vulnerable
Ubuntu	flatpak	pro	`1.14.5-1build1`	vulnerable
Ubuntu	flatpak	pro	`1.14.5-1build4`	vulnerable
Ubuntu	flatpak	pro	`1.14.5-1build5`	vulnerable
Ubuntu	flatpak	pro	`1.14.5-1build6`	vulnerable
Ubuntu	flatpak	pro	`1.14.6-1`	vulnerable
Ubuntu	flatpak	pro	`1.14.6-1ubuntu0.1`	vulnerable
Ubuntu	flatpak	pro	`1.14.6-1ubuntu0.1+esm1`	vulnerable
Ubuntu	flatpak	26.04	`1.16.1-2ubuntu1`	vulnerable
Ubuntu	flatpak	26.04	`1.16.1-3ubuntu1`	vulnerable
Ubuntu	flatpak	26.04	`1.16.2-1`	vulnerable
Ubuntu	flatpak	26.04	`1.16.3-1`	vulnerable
Ubuntu	flatpak	26.04	`1.16.3-1build1`	vulnerable
Ubuntu	flatpak	26.04	`1.16.4-1`	vulnerable
Ubuntu	flatpak	26.04	`1.16.4-2`	vulnerable
Ubuntu	flatpak	26.04	`1.16.6-1`	vulnerable

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	flatpak	source	sid	`1.18.1-1`	not yet assigned	Not reported	[1144130]
Debian	flatpak	source	forky	`1.18.1-1`	not yet assigned	Not reported	[1144130]
Debian	flatpak	source	trixie	`Not affected`	unimportant	Not reported	[1144130]
Debian	flatpak	source	bookworm	`Not affected`	unimportant	Not reported	[1144130]

[Debian bug #1144130]

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[flatpak]Not affected
Details (6)
- 1.14.10-1~deb12u2 · amd64 · bookworm
  Not affected
  dsa · flatpak · debian · bookworm
- 1.14.10-1~deb12u2 · arm64 · bookworm
  Not affected
  dsa · flatpak · debian · bookworm
- 1.16.6-1~deb13u1~bpo12+1 · amd64 · bookworm-backports
  Not affected
  dsa · flatpak · debian · bookworm
- 1.16.6-1~deb13u1~bpo12+1 · arm64 · bookworm-backports
  Not affected
  dsa · flatpak · debian · bookworm
- 1.14.10-1~deb12u2 · amd64 · bookworm-security
  Not affected
  dsa · flatpak · debian · bookworm
- 1.14.10-1~deb12u2 · arm64 · bookworm-security
  Not affected
  dsa · flatpak · debian · bookworm
[flatpak-tests]Not affected
Source package: [flatpak]
Details (6)
- 1.14.10-1~deb12u2 · amd64 · bookworm
  Not affected
  dsa · flatpak · debian · bookworm
- 1.14.10-1~deb12u2 · arm64 · bookworm
  Not affected
  dsa · flatpak · debian · bookworm
- 1.16.6-1~deb13u1~bpo12+1 · amd64 · bookworm-backports
  Not affected
  dsa · flatpak · debian · bookworm
- 1.16.6-1~deb13u1~bpo12+1 · arm64 · bookworm-backports
  Not affected
  dsa · flatpak · debian · bookworm
- 1.14.10-1~deb12u2 · amd64 · bookworm-security
  Not affected
  dsa · flatpak · debian · bookworm
- 1.14.10-1~deb12u2 · arm64 · bookworm-security
  Not affected
  dsa · flatpak · debian · bookworm
[gir1.2-flatpak-1.0]Not affected
Source package: [flatpak]
Details (6)
- 1.14.10-1~deb12u2 · amd64 · bookworm
  Not affected
  dsa · flatpak · debian · bookworm
- 1.14.10-1~deb12u2 · arm64 · bookworm
  Not affected
  dsa · flatpak · debian · bookworm
- 1.16.6-1~deb13u1~bpo12+1 · amd64 · bookworm-backports
  Not affected
  dsa · flatpak · debian · bookworm
- 1.16.6-1~deb13u1~bpo12+1 · arm64 · bookworm-backports
  Not affected
  dsa · flatpak · debian · bookworm
- 1.14.10-1~deb12u2 · amd64 · bookworm-security
  Not affected
  dsa · flatpak · debian · bookworm
- 1.14.10-1~deb12u2 · arm64 · bookworm-security
  Not affected
  dsa · flatpak · debian · bookworm
[libflatpak0]Not affected
Source package: [flatpak]
Details (6)
- 1.14.10-1~deb12u2 · amd64 · bookworm
  Not affected
  dsa · flatpak · debian · bookworm
- 1.14.10-1~deb12u2 · arm64 · bookworm
  Not affected
  dsa · flatpak · debian · bookworm
- 1.16.6-1~deb13u1~bpo12+1 · amd64 · bookworm-backports
  Not affected
  dsa · flatpak · debian · bookworm
- 1.16.6-1~deb13u1~bpo12+1 · arm64 · bookworm-backports
  Not affected
  dsa · flatpak · debian · bookworm
- 1.14.10-1~deb12u2 · amd64 · bookworm-security
  Not affected
  dsa · flatpak · debian · bookworm
- 1.14.10-1~deb12u2 · arm64 · bookworm-security
  Not affected
  dsa · flatpak · debian · bookworm
[libflatpak-dev]Not affected
Source package: [flatpak]
Details (6)
- 1.14.10-1~deb12u2 · amd64 · bookworm
  Not affected
  dsa · flatpak · debian · bookworm
- 1.14.10-1~deb12u2 · arm64 · bookworm
  Not affected
  dsa · flatpak · debian · bookworm
- 1.16.6-1~deb13u1~bpo12+1 · amd64 · bookworm-backports
  Not affected
  dsa · flatpak · debian · bookworm
- 1.16.6-1~deb13u1~bpo12+1 · arm64 · bookworm-backports
  Not affected
  dsa · flatpak · debian · bookworm
- 1.14.10-1~deb12u2 · amd64 · bookworm-security
  Not affected
  dsa · flatpak · debian · bookworm
- 1.14.10-1~deb12u2 · arm64 · bookworm-security
  Not affected
  dsa · flatpak · debian · bookworm
[libflatpak-doc]Not affected
Source package: [flatpak]
Details (6)
- 1.14.10-1~deb12u2 · all · bookworm
  Not affected
  dsa · flatpak · debian · bookworm
- 1.14.10-1~deb12u2 · all · bookworm
  Not affected
  dsa · flatpak · debian · bookworm
- 1.16.6-1~deb13u1~bpo12+1 · all · bookworm-backports
  Not affected
  dsa · flatpak · debian · bookworm
- 1.16.6-1~deb13u1~bpo12+1 · all · bookworm-backports
  Not affected
  dsa · flatpak · debian · bookworm
- 1.14.10-1~deb12u2 · all · bookworm-security
  Not affected
  dsa · flatpak · debian · bookworm
- 1.14.10-1~deb12u2 · all · bookworm-security
  Not affected
  dsa · flatpak · debian · bookworm

Observed: Oct 27, 2026, 7:10:12 AM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]