Description
A path traversal vulnerability in Flatpak's handling of the files/etc directory during app deployment allows a malicious Flatpak app to cause certain host system files (such as passwd, group, machine-id, or resolv.conf) to be emptied or replaced with a symlink when the app is installed or upgraded. In system-wide installations, the write is performed as root.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | — | — |
| Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support | — | — |
| Red Hat | Red Hat Enterprise Linux 8 | — | — |
| Red Hat | Red Hat Enterprise Linux 9 | — | — |
| Red Hat | Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions | — | — |
| Red Hat | Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions | — | — |
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support | — | — |
| Red Hat | Red Hat Enterprise Linux 7 | — | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | flatpak | 1.18.4-1 | — |
| Debian 13 | flatpak | 1.16.6-1~deb13u3 | — |
| Debian 12 | flatpak | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | flatpak | No fix yet | — |
| Ubuntu 26.04 LTS | flatpak | No fix yet | — |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 24.04 LTS | flatpak | No fix yet | — |
| Ubuntu Pro 22.04 LTS | flatpak | No fix yet | — |
| Ubuntu Pro 20.04 LTS | flatpak | No fix yet | — |
| Ubuntu Pro 18.04 LTS | flatpak | No fix yet | — |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | flatpak +4 | 1.16.0-9.el10_2.6 | ALSA-2026:89849 |
| AlmaLinux 9 | flatpak +2 | 1.12.9-4.el9_8.6 | ALSA-2026:89850 |
| AlmaLinux 8 | flatpak +4 | 1.12.9-9.el8_10 | ALSA-2026:89859 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | flatpak | 1.16.0-9.el10_2.6 | RLSA-2026:89849 |
| Rocky Linux 9 | flatpak | 1.12.9-4.el9_8.6 | RLSA-2026:89850 |
| Rocky Linux 8 | flatpak | 1.12.9-9.el8_10 | RLSA-2026:89859 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | flatpak | 1.18.4-1.1 | openSUSE-SU-2026:11918-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | flatpak +4 | 1.16.0-9.el10_2.6 | ELSA-2026-89849 |
| Oracle Linux 9 | flatpak +4 | 1.12.9-4.el9_8.6 | ELSA-2026-89850 |
| Oracle Linux 8 | flatpak +4 | 1.12.9-9.el8_10 | ELSA-2026-89859 |
Advisories 11
- WID-SEC-2026-4147 Red Hat Enterprise Linux Flatpack: Mehrere Schwachstellen ermöglichen Manipulation von Dateien BSI CERT-Bund (WID) · Nov 11, 2026
- ALSA-2026:89850 Important: flatpak security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:89849 Important: flatpak security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:89859 Important: flatpak security update AlmaLinux Security Advisories · Oct 29, 2026
- RLSA-2026:89850 Important: flatpak security update Rocky Linux Security Advisories · Oct 27, 2026
- RLSA-2026:89849 Important: flatpak security update Rocky Linux Security Advisories · Oct 27, 2026
- RLSA-2026:89859 Important: flatpak security update Rocky Linux Security Advisories · Oct 27, 2026
- ELSA-2026-89849 Important: flatpak security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Oct 26, 2026
- ELSA-2026-89850 Important: flatpak security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Oct 26, 2026
- ELSA-2026-89859 Important: flatpak security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Oct 26, 2026
- openSUSE-SU-2026:11918-1 flatpak-1.18.4-1.1 on GA media SUSE / openSUSE Security Updates · Sep 30, 2026
References
- RHSA-2026:89849 vendor-advisory
- RHSA-2026:89850 vendor-advisory
- RHSA-2026:89859 vendor-advisory
- RHSA-2026:95061 vendor-advisory
- RHSA-2026:95062 vendor-advisory
- RHSA-2026:95063 vendor-advisory
- RHSA-2026:95064 vendor-advisory
- RHSA-2026:98490 vendor-advisory
- RHSA-2026:98595 vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-97024 vdb-entry
- RHBZ#2542625 issue-tracking
- https://github.com/flatpak/flatpak/security/advisories/GHSA-8xgq-v545-vgvf