# CVE-2026-96807: flatpak: In Flatpak before 1.18.1, a malicious sandboxed app can replace ~/.var/app/$appid/.ld.so with a symlink, causing rege...

CVE-2026-96807 is fixed in 11 products on 1 platform, first by DEBIAN-CVE-2026-96807, released September 24, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-96807
- Priority: Routine
- CVSS: 4.0 (medium)
- EPSS: 0.0012
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 23, 2026

## Description

In Flatpak before 1.18.1, a malicious sandboxed app can replace ~/.var/app/$appid/.ld.so with a symlink, causing regenerate_ld_cache to write files at an arbitrary location. The filenames and content are not attacker controlled, making this hard to exploit.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | flatpak Debian 13.5 (trixie) | 1.16.6-1~deb13u2 | [DEBIAN-CVE-2026-96807](https://patchblox.com/security/data/fix/linux/debian-cve-2026-96807.md) | Sep 24, 2026 |
| Linux | flatpak Debian 14 | 1.18.1-1 | [DEBIAN-CVE-2026-96807](https://patchblox.com/security/data/fix/linux/debian-cve-2026-96807.md) | Sep 24, 2026 |
| Linux | flatpak Fedora 43 | 1.16.6-2.fc43 | [FEDORA-2026-A896CBB3F0](https://patchblox.com/security/data/fix/linux/fedora-2026-a896cbb3f0.md) | Nov 7, 2026 |
| Linux | flatpak sles 15.6 | 1.16.6-150600.3.12.1 | [SUSE-SU-2026:4944-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4944-1.md) | Nov 7, 2026 |
| Linux | flatpak sles 15.7 | 1.16.6-150600.3.12.1 | [SUSE-SU-2026:4944-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4944-1.md) | Nov 7, 2026 |
| Linux | flatpak-debuginfo Fedora 43 | 1.16.6-2.fc43 | [FEDORA-2026-A896CBB3F0](https://patchblox.com/security/data/fix/linux/fedora-2026-a896cbb3f0.md) | Nov 7, 2026 |
| Linux | flatpak-debugsource Fedora 43 | 1.16.6-2.fc43 | [FEDORA-2026-A896CBB3F0](https://patchblox.com/security/data/fix/linux/fedora-2026-a896cbb3f0.md) | Nov 7, 2026 |
| Linux | flatpak-devel Fedora 43 | 1.16.6-2.fc43 | [FEDORA-2026-A896CBB3F0](https://patchblox.com/security/data/fix/linux/fedora-2026-a896cbb3f0.md) | Nov 7, 2026 |
| Linux | flatpak-libs Fedora 43 | 1.16.6-2.fc43 | [FEDORA-2026-A896CBB3F0](https://patchblox.com/security/data/fix/linux/fedora-2026-a896cbb3f0.md) | Nov 7, 2026 |
| Linux | flatpak-libs-debuginfo Fedora 43 | 1.16.6-2.fc43 | [FEDORA-2026-A896CBB3F0](https://patchblox.com/security/data/fix/linux/fedora-2026-a896cbb3f0.md) | Nov 7, 2026 |
| Linux | flatpak-selinux Fedora 43 | 1.16.6-2.fc43 | [FEDORA-2026-A896CBB3F0](https://patchblox.com/security/data/fix/linux/fedora-2026-a896cbb3f0.md) | Nov 7, 2026 |
| Linux | flatpak-session-helper Fedora 43 | 1.16.6-2.fc43 | [FEDORA-2026-A896CBB3F0](https://patchblox.com/security/data/fix/linux/fedora-2026-a896cbb3f0.md) | Nov 7, 2026 |
| Linux | flatpak-session-helper-debuginfo Fedora 43 | 1.16.6-2.fc43 | [FEDORA-2026-A896CBB3F0](https://patchblox.com/security/data/fix/linux/fedora-2026-a896cbb3f0.md) | Nov 7, 2026 |
| Linux | flatpak-tests Fedora 43 | 1.16.6-2.fc43 | [FEDORA-2026-A896CBB3F0](https://patchblox.com/security/data/fix/linux/fedora-2026-a896cbb3f0.md) | Nov 7, 2026 |
| Linux | flatpak-tests-debuginfo Fedora 43 | 1.16.6-2.fc43 | [FEDORA-2026-A896CBB3F0](https://patchblox.com/security/data/fix/linux/fedora-2026-a896cbb3f0.md) | Nov 7, 2026 |

---

Data as of 2026-11-08T13:06:02Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.