CVE-2026-96807: Flatpak

Medium severity, CVSS 4.0. EPSS: 0.1% chance of exploitation in the next 30 days.

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.

Affected products

• Flatpak Flatpak: before 1.18.1 (fixed in 1.18.1)

Published 2026-09-23. Last modified 2026-09-26.