CVE catalog
CVE-2026-96276
flatpak: CVE-2026-96276
- Severity
- Critical · CVSS 9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.44% · Oct 25, 2026
If a malicious SDK container declares an extension point with a crafted `directory` path, and a developer runs `flatpak build-init --writable-sdk --sdk-extension` with that SDK, attacker-chosen files could be written outside the working directory, since the target path is resolved via a function that allows `..` traversal.
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 | fixed |
| Debian | flatpak | trixie-security | 1.16.6-1~deb13u3 | fixed |
| Debian | flatpak | bookworm | 1.14.10-1~deb12u2 | vulnerable |
| Debian | flatpak | bookworm-security | 1.14.10-1~deb12u2 | vulnerable |
| 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 | 1.16.6-1~deb13u2 | not yet assigned | Not reported | [1144130] |
| Debian | flatpak | source | bookworm | (unfixed) | not yet assigned | Not reported | [1144130] |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [flatpak]Affected
Details (6)
1.14.10-1~deb12u2· amd64 · bookwormAffected
dsa · flatpak · debian · bookworm; dsa · flatpak · debian · 12
1.14.10-1~deb12u2· arm64 · bookwormAffected
dsa · flatpak · debian · bookworm; dsa · flatpak · debian · 12
1.16.6-1~deb13u1~bpo12+1· amd64 · bookworm-backportsAffected
dsa · flatpak · debian · bookworm; dsa · flatpak · debian · 12
1.16.6-1~deb13u1~bpo12+1· arm64 · bookworm-backportsAffected
dsa · flatpak · debian · bookworm; dsa · flatpak · debian · 12
1.14.10-1~deb12u2· amd64 · bookworm-securityAffected
dsa · flatpak · debian · bookworm; dsa · flatpak · debian · 12
1.14.10-1~deb12u2· arm64 · bookworm-securityAffected
dsa · flatpak · debian · bookworm; dsa · flatpak · debian · 12
- [flatpak-tests]Affected
Source package: [flatpak]
Details (6)
1.14.10-1~deb12u2· amd64 · bookwormAffected
dsa · flatpak · debian · bookworm; dsa · flatpak · debian · 12
1.14.10-1~deb12u2· arm64 · bookwormAffected
dsa · flatpak · debian · bookworm; dsa · flatpak · debian · 12
1.16.6-1~deb13u1~bpo12+1· amd64 · bookworm-backportsAffected
dsa · flatpak · debian · bookworm; dsa · flatpak · debian · 12
1.16.6-1~deb13u1~bpo12+1· arm64 · bookworm-backportsAffected
dsa · flatpak · debian · bookworm; dsa · flatpak · debian · 12
1.14.10-1~deb12u2· amd64 · bookworm-securityAffected
dsa · flatpak · debian · bookworm; dsa · flatpak · debian · 12
1.14.10-1~deb12u2· arm64 · bookworm-securityAffected
dsa · flatpak · debian · bookworm; dsa · flatpak · debian · 12
- [gir1.2-flatpak-1.0]Affected
Source package: [flatpak]
Details (6)
1.14.10-1~deb12u2· amd64 · bookwormAffected
dsa · flatpak · debian · bookworm; dsa · flatpak · debian · 12
1.14.10-1~deb12u2· arm64 · bookwormAffected
dsa · flatpak · debian · bookworm; dsa · flatpak · debian · 12
1.16.6-1~deb13u1~bpo12+1· amd64 · bookworm-backportsAffected
dsa · flatpak · debian · bookworm; dsa · flatpak · debian · 12
1.16.6-1~deb13u1~bpo12+1· arm64 · bookworm-backportsAffected
dsa · flatpak · debian · bookworm; dsa · flatpak · debian · 12
1.14.10-1~deb12u2· amd64 · bookworm-securityAffected
dsa · flatpak · debian · bookworm; dsa · flatpak · debian · 12
1.14.10-1~deb12u2· arm64 · bookworm-securityAffected
dsa · flatpak · debian · bookworm; dsa · flatpak · debian · 12
- [libflatpak0]Affected
Source package: [flatpak]
Details (6)
1.14.10-1~deb12u2· amd64 · bookwormAffected
dsa · flatpak · debian · bookworm; dsa · flatpak · debian · 12
1.14.10-1~deb12u2· arm64 · bookwormAffected
dsa · flatpak · debian · bookworm; dsa · flatpak · debian · 12
1.16.6-1~deb13u1~bpo12+1· amd64 · bookworm-backportsAffected
dsa · flatpak · debian · bookworm; dsa · flatpak · debian · 12
1.16.6-1~deb13u1~bpo12+1· arm64 · bookworm-backportsAffected
dsa · flatpak · debian · bookworm; dsa · flatpak · debian · 12
1.14.10-1~deb12u2· amd64 · bookworm-securityAffected
dsa · flatpak · debian · bookworm; dsa · flatpak · debian · 12
1.14.10-1~deb12u2· arm64 · bookworm-securityAffected
dsa · flatpak · debian · bookworm; dsa · flatpak · debian · 12
- [libflatpak-dev]Affected
Source package: [flatpak]
Details (6)
1.14.10-1~deb12u2· amd64 · bookwormAffected
dsa · flatpak · debian · bookworm; dsa · flatpak · debian · 12
1.14.10-1~deb12u2· arm64 · bookwormAffected
dsa · flatpak · debian · bookworm; dsa · flatpak · debian · 12
1.16.6-1~deb13u1~bpo12+1· amd64 · bookworm-backportsAffected
dsa · flatpak · debian · bookworm; dsa · flatpak · debian · 12
1.16.6-1~deb13u1~bpo12+1· arm64 · bookworm-backportsAffected
dsa · flatpak · debian · bookworm; dsa · flatpak · debian · 12
1.14.10-1~deb12u2· amd64 · bookworm-securityAffected
dsa · flatpak · debian · bookworm; dsa · flatpak · debian · 12
1.14.10-1~deb12u2· arm64 · bookworm-securityAffected
dsa · flatpak · debian · bookworm; dsa · flatpak · debian · 12
- [libflatpak-doc]Affected
Source package: [flatpak]
Details (6)
1.14.10-1~deb12u2· all · bookwormAffected
dsa · flatpak · debian · bookworm; dsa · flatpak · debian · 12
1.14.10-1~deb12u2· all · bookwormAffected
dsa · flatpak · debian · bookworm; dsa · flatpak · debian · 12
1.16.6-1~deb13u1~bpo12+1· all · bookworm-backportsAffected
dsa · flatpak · debian · bookworm; dsa · flatpak · debian · 12
1.16.6-1~deb13u1~bpo12+1· all · bookworm-backportsAffected
dsa · flatpak · debian · bookworm; dsa · flatpak · debian · 12
1.14.10-1~deb12u2· all · bookworm-securityAffected
dsa · flatpak · debian · bookworm; dsa · flatpak · debian · 12
1.14.10-1~deb12u2· all · bookworm-securityAffected
dsa · flatpak · debian · bookworm; dsa · flatpak · debian · 12
[Debian 13 (Trixie)]
- [flatpak]Affected
Details (6)
1.16.6-1~deb13u1· amd64 · trixieAffected · Fixed:
1.16.6-1~deb13u2dsa · flatpak · debian · 13
1.16.6-1~deb13u1· arm64 · trixieAffected · Fixed:
1.16.6-1~deb13u2dsa · flatpak · debian · 13
1.16.6-1~deb13u1· amd64 · trixie-security · Historical versionAffected · Fixed:
1.16.6-1~deb13u2dsa · flatpak · debian · 13
1.16.6-1~deb13u2· amd64 · trixie-security · Historical versionFixed · Fixed:
1.16.6-1~deb13u2dsa · flatpak · debian · 13
1.16.6-1~deb13u2· arm64 · trixie-securityFixed · Fixed:
1.16.6-1~deb13u2dsa · flatpak · debian · 13
1.16.6-1~deb13u3· amd64 · trixie-securityFixed · Fixed:
1.16.6-1~deb13u2dsa · flatpak · debian · 13
- [flatpak-tests]Affected
Source package: [flatpak]
Details (6)
1.16.6-1~deb13u1· amd64 · trixieAffected · Fixed:
1.16.6-1~deb13u2dsa · flatpak · debian · 13
1.16.6-1~deb13u1· arm64 · trixieAffected · Fixed:
1.16.6-1~deb13u2dsa · flatpak · debian · 13
1.16.6-1~deb13u1· amd64 · trixie-security · Historical versionAffected · Fixed:
1.16.6-1~deb13u2dsa · flatpak · debian · 13
1.16.6-1~deb13u2· amd64 · trixie-security · Historical versionFixed · Fixed:
1.16.6-1~deb13u2dsa · flatpak · debian · 13
1.16.6-1~deb13u2· arm64 · trixie-securityFixed · Fixed:
1.16.6-1~deb13u2dsa · flatpak · debian · 13
1.16.6-1~deb13u3· amd64 · trixie-securityFixed · Fixed:
1.16.6-1~deb13u2dsa · flatpak · debian · 13
- [gir1.2-flatpak-1.0]Affected
Source package: [flatpak]
Details (6)
1.16.6-1~deb13u1· amd64 · trixieAffected · Fixed:
1.16.6-1~deb13u2dsa · flatpak · debian · 13
1.16.6-1~deb13u1· arm64 · trixieAffected · Fixed:
1.16.6-1~deb13u2dsa · flatpak · debian · 13
1.16.6-1~deb13u1· amd64 · trixie-security · Historical versionAffected · Fixed:
1.16.6-1~deb13u2dsa · flatpak · debian · 13
1.16.6-1~deb13u2· amd64 · trixie-security · Historical versionFixed · Fixed:
1.16.6-1~deb13u2dsa · flatpak · debian · 13
1.16.6-1~deb13u2· arm64 · trixie-securityFixed · Fixed:
1.16.6-1~deb13u2dsa · flatpak · debian · 13
1.16.6-1~deb13u3· amd64 · trixie-securityFixed · Fixed:
1.16.6-1~deb13u2dsa · flatpak · debian · 13
- [libflatpak0]Affected
Source package: [flatpak]
Details (6)
1.16.6-1~deb13u1· amd64 · trixieAffected · Fixed:
1.16.6-1~deb13u2dsa · flatpak · debian · 13
1.16.6-1~deb13u1· arm64 · trixieAffected · Fixed:
1.16.6-1~deb13u2dsa · flatpak · debian · 13
1.16.6-1~deb13u1· amd64 · trixie-security · Historical versionAffected · Fixed:
1.16.6-1~deb13u2dsa · flatpak · debian · 13
1.16.6-1~deb13u2· amd64 · trixie-security · Historical versionFixed · Fixed:
1.16.6-1~deb13u2dsa · flatpak · debian · 13
1.16.6-1~deb13u2· arm64 · trixie-securityFixed · Fixed:
1.16.6-1~deb13u2dsa · flatpak · debian · 13
1.16.6-1~deb13u3· amd64 · trixie-securityFixed · Fixed:
1.16.6-1~deb13u2dsa · flatpak · debian · 13
- [libflatpak-dev]Affected
Source package: [flatpak]
Details (6)
1.16.6-1~deb13u1· amd64 · trixieAffected · Fixed:
1.16.6-1~deb13u2dsa · flatpak · debian · 13
1.16.6-1~deb13u1· arm64 · trixieAffected · Fixed:
1.16.6-1~deb13u2dsa · flatpak · debian · 13
1.16.6-1~deb13u1· amd64 · trixie-security · Historical versionAffected · Fixed:
1.16.6-1~deb13u2dsa · flatpak · debian · 13
1.16.6-1~deb13u2· amd64 · trixie-security · Historical versionFixed · Fixed:
1.16.6-1~deb13u2dsa · flatpak · debian · 13
1.16.6-1~deb13u2· arm64 · trixie-securityFixed · Fixed:
1.16.6-1~deb13u2dsa · flatpak · debian · 13
1.16.6-1~deb13u3· amd64 · trixie-securityFixed · Fixed:
1.16.6-1~deb13u2dsa · flatpak · debian · 13
- [libflatpak-doc]Affected
Source package: [flatpak]
Details (6)
1.16.6-1~deb13u1· all · trixieAffected · Fixed:
1.16.6-1~deb13u2dsa · flatpak · debian · 13
1.16.6-1~deb13u1· all · trixieAffected · Fixed:
1.16.6-1~deb13u2dsa · flatpak · debian · 13
1.16.6-1~deb13u1· all · trixie-security · Historical versionAffected · Fixed:
1.16.6-1~deb13u2dsa · flatpak · debian · 13
1.16.6-1~deb13u2· all · trixie-security · Historical versionFixed · Fixed:
1.16.6-1~deb13u2dsa · flatpak · debian · 13
1.16.6-1~deb13u2· all · trixie-securityFixed · Fixed:
1.16.6-1~deb13u2dsa · flatpak · debian · 13
1.16.6-1~deb13u3· all · trixie-securityFixed · Fixed:
1.16.6-1~deb13u2dsa · flatpak · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/suse-su-2026_4610-1.json]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-96276]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-96276]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2026-96276]
- [https://security-tracker.debian.org/tracker/CVE-2026-96276]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-96276.json]
[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]