DEBIAN-CVE-2026-90616

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Source
https://security-tracker.debian.org/tracker/CVE-2026-90616
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-90616.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-90616
Upstream
Published
2026-09-12T20:16:30Z
Modified
2026-09-15T08:47:29Z
Severity
  • 7.4 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

In Flatpak before 1.18.1, a malicious sandboxed app can obtain arbitrary read and write access to files on the host, which can be escalated to arbitrary code execution on the host, a different vulnerability than CVE-2026-76925. Flatpak creates a few app data directories (e.g., /var/cache, /var/data, /var/config, and /var/tmp) in every sandbox on every app launch where, in some cases, components of the path are attacker-controlled. Missing symlink protection can redirect the directories. Some of these directories are bind-mounted by Flatpak by passing the path (e.g., /home/user/.var/app/APP_ID/cache/tmp), which contains attacker-controlled directories (tmp) to bwrap --bind SRC DST. bwrap passes the path on to the kernel, which then follows symlinks. A malicious symlink can point to arbitrary locations on the host and it will become mounted inside the sandbox.

References

Affected packages

Debian:12 / flatpak

Package

Name
flatpak
Purl
pkg:deb/debian/flatpak?arch=source&distro=bookworm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.14.4-1
1.14.4-1+deb12u1~bpo11+1
1.14.4-1+deb12u1
1.14.4-2
1.14.5-1
1.14.6-1~deb13u1
1.14.6-1
1.14.8-1~deb12u1
1.14.8-1
1.14.10-1~deb12u1
1.14.10-1~deb12u2
1.14.10-1
1.15.0-1
1.15.0-2
1.15.1-1
1.15.2-1
1.15.3-1
1.15.4-1
1.15.6-1
1.15.7-1
1.15.8-1
1.15.9-1
1.15.10-1
1.15.12-1
1.15.91-1
1.16.0-1
1.16.0-2~bpo12+1
1.16.0-2
1.16.1-1~bpo12+1
1.16.1-1
1.16.1-2
1.16.1-3
1.16.2-1~deb13u1
1.16.2-1
1.16.3-1~deb13u1
1.16.3-1
1.16.4-1
1.16.4-2
1.16.5-1
1.16.6-1~deb13u1~bpo12+1
1.16.6-1~deb13u1
1.16.6-1~deb13u2
1.16.6-1
1.17.2-1
1.17.3-1
1.17.3-2
1.17.6-1
1.18.0-1
1.18.1-1
1.18.2-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-90616.json"

Debian:13 / flatpak

Package

Name
flatpak
Purl
pkg:deb/debian/flatpak?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.16.6-1~deb13u2

Affected versions

1.*
1.16.1-1
1.16.1-2
1.16.1-3
1.16.2-1~deb13u1
1.16.2-1
1.16.3-1~deb13u1
1.16.3-1
1.16.4-1
1.16.4-2
1.16.5-1
1.16.6-1~deb13u1~bpo12+1
1.16.6-1~deb13u1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-90616.json"

Debian:14 / flatpak

Package

Name
flatpak
Purl
pkg:deb/debian/flatpak?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.18.1-1

Affected versions

1.*
1.16.1-1
1.16.1-2
1.16.1-3
1.16.2-1~deb13u1
1.16.2-1
1.16.3-1~deb13u1
1.16.3-1
1.16.4-1
1.16.4-2
1.16.5-1
1.16.6-1~deb13u1~bpo12+1
1.16.6-1~deb13u1
1.16.6-1~deb13u2
1.16.6-1
1.17.2-1
1.17.3-1
1.17.3-2
1.17.6-1
1.18.0-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-90616.json"