# CVE-2026-34078: flatpak: Flatpak is a Linux application sandboxing and distribution framework

CVE-2026-34078 is fixed in 13 products on 1 platform, first by flatpak 1.6.5-0ubuntu0.5+esm1, released April 7, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-34078
- Priority: High
- CVSS: 10.0 (Medium)
- EPSS: 0.0171
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 7, 2026

## Description

Flatpak is a Linux application sandboxing and distribution framework. Prior to 1.16.4, the Flatpak portal accepts paths in the sandbox-expose options which can be app-controlled symlinks pointing at arbitrary paths. Flatpak run mounts the resolved host path in the sandbox. This gives apps access to all host files and can be used as a primitive to gain code execution in the host context. This vulnerability is fixed in 1.16.4.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | flatpak Debian 12.15 (bookworm) | 1.14.10-1~deb12u2 | [DEBIAN-CVE-2026-34078](https://patchblox.com/security/data/fix/linux/debian-cve-2026-34078.md) | Apr 7, 2026 |
| Linux | flatpak Debian 13.5 (trixie) | 1.16.6-1~deb13u1 | [DEBIAN-CVE-2026-34078](https://patchblox.com/security/data/fix/linux/debian-cve-2026-34078.md) | Apr 7, 2026 |
| Linux | flatpak Debian 14 | 1.16.4-1 | [DEBIAN-CVE-2026-34078](https://patchblox.com/security/data/fix/linux/debian-cve-2026-34078.md) | Apr 7, 2026 |
| Linux | flatpak RHEL 10 | 1.16.0-5.el10_0.2 | [RHSA-2026:23420](https://patchblox.com/security/data/fix/linux/rhsa-2026-23420.md) | Apr 7, 2026 |
| Linux | flatpak RHEL 8 | 0:1.12.9-4.el8_10 | [RHSA-2026:21756](https://patchblox.com/security/data/fix/linux/rhsa-2026-21756.md) | Jun 24, 2026 |
| Linux | flatpak RHEL 9 | 0:1.12.9-4.el9_8.1 | [RHSA-2026:21755](https://patchblox.com/security/data/fix/linux/rhsa-2026-21755.md) | Jun 24, 2026 |
| Linux | flatpak Ubuntu 20.04 LTS (focal) | 1.6.5-0ubuntu0.5+esm1 | [flatpak 1.6.5-0ubuntu0.5+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-flatpak-1.6.5-0ubuntu0.5-esm1.md) | Apr 7, 2026 |
| Linux | flatpak Ubuntu 22.04.1 LTS (jammy) | 1.12.7-1ubuntu0.1+esm1 | [flatpak 1.12.7-1ubuntu0.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-flatpak-1.12.7-1ubuntu0.1-esm1.md) | Apr 7, 2026 |
| Linux | flatpak Ubuntu 24.04.5 LTS (noble) | 1.14.6-1ubuntu0.1+esm1 | [flatpak 1.14.6-1ubuntu0.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-flatpak-1.14.6-1ubuntu0.1-esm1.md) | Apr 7, 2026 |
| Linux | flatpak almalinux 10 | 1.16.0-9.el10_2.1 | [ALSA-2026:21757](https://patchblox.com/security/data/fix/linux/alsa-2026-21757.md) | May 28, 2026 |
| Linux | flatpak almalinux 8 | 1.12.9-4.el8_10 | [ALSA-2026:21756](https://patchblox.com/security/data/fix/linux/alsa-2026-21756.md) | May 28, 2026 |
| Linux | flatpak almalinux 9 | 1.12.9-4.el9_8.1 | [ALSA-2026:21755](https://patchblox.com/security/data/fix/linux/alsa-2026-21755.md) | May 28, 2026 |
| Linux | flatpak amzn 2023 | 1.16.6-1.amzn2023 | [ALAS2023-2026-1601](https://patchblox.com/security/data/fix/linux/alas2023-2026-1601.md) | Apr 27, 2026 |
| Linux | flatpak ol 10 | 0:1.16.0-9.el10_2.1 | [ELSA-2026-21757](https://patchblox.com/security/data/fix/linux/elsa-2026-21757.md) | Jul 16, 2026 |
| Linux | flatpak ol 8 | 0:1.12.9-4.el8_10 | [ELSA-2026-21756](https://patchblox.com/security/data/fix/linux/elsa-2026-21756.md) | May 28, 2026 |
| Linux | flatpak ol 9 | 0:1.12.9-4.el9_8.1 | [ELSA-2026-21755](https://patchblox.com/security/data/fix/linux/elsa-2026-21755.md) | Jun 23, 2026 |
| Linux | flatpak rocky 10 | 0:1.16.0-9.el10_2.1 | [RLSA-2026:21757](https://patchblox.com/security/data/fix/linux/rlsa-2026-21757.md) | Jun 4, 2026 |
| Linux | flatpak rocky 8 | 0:1.12.9-4.el8_10 | [RLSA-2026:21756](https://patchblox.com/security/data/fix/linux/rlsa-2026-21756.md) | May 29, 2026 |
| Linux | flatpak rocky 9 | 0:1.12.9-4.el9_8.1 | [RLSA-2026:21755](https://patchblox.com/security/data/fix/linux/rlsa-2026-21755.md) | Jun 5, 2026 |
| Linux | flatpak sles 15.6 | 1.16.0-150600.3.9.1 | [SUSE-SU-2026:1600-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1600-1.md) | Apr 24, 2026 |
| Linux | flatpak sles 15.7 | 1.16.0-150600.3.9.1 | [SUSE-SU-2026:1600-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1600-1.md) | Apr 24, 2026 |
| Linux | flatpak-debuginfo amzn 2023 | 1.16.6-1.amzn2023 | [ALAS2023-2026-1601](https://patchblox.com/security/data/fix/linux/alas2023-2026-1601.md) | Apr 27, 2026 |
| Linux | flatpak-debugsource amzn 2023 | 1.16.6-1.amzn2023 | [ALAS2023-2026-1601](https://patchblox.com/security/data/fix/linux/alas2023-2026-1601.md) | Apr 27, 2026 |
| Linux | flatpak-devel RHEL 8 | 0:1.12.9-4.el8_10 | [RHSA-2026:21756](https://patchblox.com/security/data/fix/linux/rhsa-2026-21756.md) | Jun 24, 2026 |
| Linux | flatpak-devel RHEL 9 | 0:1.12.9-4.el9_8.1 | [RHSA-2026:21755](https://patchblox.com/security/data/fix/linux/rhsa-2026-21755.md) | Jun 24, 2026 |
| Linux | flatpak-devel almalinux 10 | 1.16.0-9.el10_2.1 | [ALSA-2026:21757](https://patchblox.com/security/data/fix/linux/alsa-2026-21757.md) | May 28, 2026 |
| Linux | flatpak-devel almalinux 8 | 1.12.9-4.el8_10 | [ALSA-2026:21756](https://patchblox.com/security/data/fix/linux/alsa-2026-21756.md) | May 28, 2026 |
| Linux | flatpak-devel almalinux 9 | 1.12.9-4.el9_8.1 | [ALSA-2026:21755](https://patchblox.com/security/data/fix/linux/alsa-2026-21755.md) | May 28, 2026 |
| Linux | flatpak-devel amzn 2023 | 1.16.6-1.amzn2023 | [ALAS2023-2026-1601](https://patchblox.com/security/data/fix/linux/alas2023-2026-1601.md) | Apr 27, 2026 |
| Linux | flatpak-devel ol 10 | 0:1.16.0-9.el10_2.1 | [ELSA-2026-21757](https://patchblox.com/security/data/fix/linux/elsa-2026-21757.md) | Jul 16, 2026 |
| Linux | flatpak-devel ol 8 | 0:1.12.9-4.el8_10 | [ELSA-2026-21756](https://patchblox.com/security/data/fix/linux/elsa-2026-21756.md) | May 28, 2026 |
| Linux | flatpak-devel ol 9 | 0:1.12.9-4.el9_8.1 | [ELSA-2026-21755](https://patchblox.com/security/data/fix/linux/elsa-2026-21755.md) | Jun 23, 2026 |
| Linux | flatpak-libs RHEL 8 | 0:1.12.9-4.el8_10 | [RHSA-2026:21756](https://patchblox.com/security/data/fix/linux/rhsa-2026-21756.md) | Jun 24, 2026 |
| Linux | flatpak-libs RHEL 9 | 0:1.12.9-4.el9_8.1 | [RHSA-2026:21755](https://patchblox.com/security/data/fix/linux/rhsa-2026-21755.md) | Jun 24, 2026 |
| Linux | flatpak-libs almalinux 10 | 1.16.0-9.el10_2.1 | [ALSA-2026:21757](https://patchblox.com/security/data/fix/linux/alsa-2026-21757.md) | May 28, 2026 |
| Linux | flatpak-libs almalinux 8 | 1.12.9-4.el8_10 | [ALSA-2026:21756](https://patchblox.com/security/data/fix/linux/alsa-2026-21756.md) | May 28, 2026 |
| Linux | flatpak-libs almalinux 9 | 1.12.9-4.el9_8.1 | [ALSA-2026:21755](https://patchblox.com/security/data/fix/linux/alsa-2026-21755.md) | May 28, 2026 |
| Linux | flatpak-libs amzn 2023 | 1.16.6-1.amzn2023 | [ALAS2023-2026-1601](https://patchblox.com/security/data/fix/linux/alas2023-2026-1601.md) | Apr 27, 2026 |
| Linux | flatpak-libs ol 10 | 0:1.16.0-9.el10_2.1 | [ELSA-2026-21757](https://patchblox.com/security/data/fix/linux/elsa-2026-21757.md) | Jul 16, 2026 |
| Linux | flatpak-libs ol 8 | 0:1.12.9-4.el8_10 | [ELSA-2026-21756](https://patchblox.com/security/data/fix/linux/elsa-2026-21756.md) | May 28, 2026 |
| Linux | flatpak-libs ol 9 | 0:1.12.9-4.el9_8.1 | [ELSA-2026-21755](https://patchblox.com/security/data/fix/linux/elsa-2026-21755.md) | Jun 23, 2026 |
| Linux | flatpak-libs-debuginfo amzn 2023 | 1.16.6-1.amzn2023 | [ALAS2023-2026-1601](https://patchblox.com/security/data/fix/linux/alas2023-2026-1601.md) | Apr 27, 2026 |
| Linux | flatpak-selinux RHEL 8 | 0:1.12.9-4.el8_10 | [RHSA-2026:21756](https://patchblox.com/security/data/fix/linux/rhsa-2026-21756.md) | Jun 24, 2026 |
| Linux | flatpak-selinux RHEL 9 | 0:1.12.9-4.el9_8.1 | [RHSA-2026:21755](https://patchblox.com/security/data/fix/linux/rhsa-2026-21755.md) | Jun 24, 2026 |
| Linux | flatpak-selinux almalinux 10 | 1.16.0-9.el10_2.1 | [ALSA-2026:21757](https://patchblox.com/security/data/fix/linux/alsa-2026-21757.md) | May 28, 2026 |
| Linux | flatpak-selinux almalinux 8 | 1.12.9-4.el8_10 | [ALSA-2026:21756](https://patchblox.com/security/data/fix/linux/alsa-2026-21756.md) | May 28, 2026 |
| Linux | flatpak-selinux almalinux 9 | 1.12.9-4.el9_8.1 | [ALSA-2026:21755](https://patchblox.com/security/data/fix/linux/alsa-2026-21755.md) | May 28, 2026 |
| Linux | flatpak-selinux amzn 2023 | 1.16.6-1.amzn2023 | [ALAS2023-2026-1601](https://patchblox.com/security/data/fix/linux/alas2023-2026-1601.md) | Apr 27, 2026 |
| Linux | flatpak-selinux ol 10 | 0:1.16.0-9.el10_2.1 | [ELSA-2026-21757](https://patchblox.com/security/data/fix/linux/elsa-2026-21757.md) | Jul 16, 2026 |
| Linux | flatpak-selinux ol 8 | 0:1.12.9-4.el8_10 | [ELSA-2026-21756](https://patchblox.com/security/data/fix/linux/elsa-2026-21756.md) | May 28, 2026 |
| Linux | flatpak-selinux ol 9 | 0:1.12.9-4.el9_8.1 | [ELSA-2026-21755](https://patchblox.com/security/data/fix/linux/elsa-2026-21755.md) | Jun 23, 2026 |
| Linux | flatpak-session-helper RHEL 8 | 0:1.12.9-4.el8_10 | [RHSA-2026:21756](https://patchblox.com/security/data/fix/linux/rhsa-2026-21756.md) | Jun 24, 2026 |
| Linux | flatpak-session-helper RHEL 9 | 0:1.12.9-4.el9_8.1 | [RHSA-2026:21755](https://patchblox.com/security/data/fix/linux/rhsa-2026-21755.md) | Jun 24, 2026 |
| Linux | flatpak-session-helper almalinux 10 | 1.16.0-9.el10_2.1 | [ALSA-2026:21757](https://patchblox.com/security/data/fix/linux/alsa-2026-21757.md) | May 28, 2026 |
| Linux | flatpak-session-helper almalinux 8 | 1.12.9-4.el8_10 | [ALSA-2026:21756](https://patchblox.com/security/data/fix/linux/alsa-2026-21756.md) | May 28, 2026 |
| Linux | flatpak-session-helper almalinux 9 | 1.12.9-4.el9_8.1 | [ALSA-2026:21755](https://patchblox.com/security/data/fix/linux/alsa-2026-21755.md) | May 28, 2026 |
| Linux | flatpak-session-helper amzn 2023 | 1.16.6-1.amzn2023 | [ALAS2023-2026-1601](https://patchblox.com/security/data/fix/linux/alas2023-2026-1601.md) | Apr 27, 2026 |
| Linux | flatpak-session-helper ol 10 | 0:1.16.0-9.el10_2.1 | [ELSA-2026-21757](https://patchblox.com/security/data/fix/linux/elsa-2026-21757.md) | Jul 16, 2026 |
| Linux | flatpak-session-helper ol 8 | 0:1.12.9-4.el8_10 | [ELSA-2026-21756](https://patchblox.com/security/data/fix/linux/elsa-2026-21756.md) | May 28, 2026 |
| Linux | flatpak-session-helper ol 9 | 0:1.12.9-4.el9_8.1 | [ELSA-2026-21755](https://patchblox.com/security/data/fix/linux/elsa-2026-21755.md) | Jun 23, 2026 |
| Linux | flatpak-session-helper-debuginfo amzn 2023 | 1.16.6-1.amzn2023 | [ALAS2023-2026-1601](https://patchblox.com/security/data/fix/linux/alas2023-2026-1601.md) | Apr 27, 2026 |
| Linux | flatpak-tests Ubuntu 20.04 LTS (focal) | 1.6.5-0ubuntu0.5+esm1 | [flatpak-tests 1.6.5-0ubuntu0.5+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-flatpak-tests-1.6.5-0ubuntu0.5-esm1.md) | Apr 7, 2026 |
| Linux | flatpak-tests Ubuntu 22.04.1 LTS (jammy) | 1.12.7-1ubuntu0.1+esm1 | [flatpak-tests 1.12.7-1ubuntu0.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-flatpak-tests-1.12.7-1ubuntu0.1-esm1.md) | Apr 7, 2026 |
| Linux | flatpak-tests Ubuntu 24.04.5 LTS (noble) | 1.14.6-1ubuntu0.1+esm1 | [flatpak-tests 1.14.6-1ubuntu0.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-flatpak-tests-1.14.6-1ubuntu0.1-esm1.md) | Apr 7, 2026 |
| Linux | flatpak-tests amzn 2023 | 1.16.6-1.amzn2023 | [ALAS2023-2026-1601](https://patchblox.com/security/data/fix/linux/alas2023-2026-1601.md) | Apr 27, 2026 |
| Linux | flatpak-tests-debuginfo amzn 2023 | 1.16.6-1.amzn2023 | [ALAS2023-2026-1601](https://patchblox.com/security/data/fix/linux/alas2023-2026-1601.md) | Apr 27, 2026 |
| Linux | gir1.2-flatpak-1.0 Ubuntu 20.04 LTS (focal) | 1.6.5-0ubuntu0.5+esm1 | [gir1.2-flatpak-1.0 1.6.5-0ubuntu0.5+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-gir1.2-flatpak-1.0-1.6.5-0ubuntu0.5-esm1.md) | Apr 7, 2026 |
| Linux | gir1.2-flatpak-1.0 Ubuntu 22.04.1 LTS (jammy) | 1.12.7-1ubuntu0.1+esm1 | [gir1.2-flatpak-1.0 1.12.7-1ubuntu0.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-gir1.2-flatpak-1.0-1.12.7-1ubuntu0.1-esm1.md) | Apr 7, 2026 |
| Linux | gir1.2-flatpak-1.0 Ubuntu 24.04.5 LTS (noble) | 1.14.6-1ubuntu0.1+esm1 | [gir1.2-flatpak-1.0 1.14.6-1ubuntu0.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-gir1.2-flatpak-1.0-1.14.6-1ubuntu0.1-esm1.md) | Apr 7, 2026 |
| Linux | libflatpak0 Ubuntu 20.04 LTS (focal) | 1.6.5-0ubuntu0.5+esm1 | [libflatpak0 1.6.5-0ubuntu0.5+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libflatpak0-1.6.5-0ubuntu0.5-esm1.md) | Apr 7, 2026 |
| Linux | libflatpak0 Ubuntu 22.04.1 LTS (jammy) | 1.12.7-1ubuntu0.1+esm1 | [libflatpak0 1.12.7-1ubuntu0.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libflatpak0-1.12.7-1ubuntu0.1-esm1.md) | Apr 7, 2026 |
| Linux | libflatpak0 Ubuntu 24.04.5 LTS (noble) | 1.14.6-1ubuntu0.1+esm1 | [libflatpak0 1.14.6-1ubuntu0.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libflatpak0-1.14.6-1ubuntu0.1-esm1.md) | Apr 7, 2026 |

---

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