CVE-2026-76925
Medium · 5.8CVSS
5.8
EPSS
0.1%
Published
Sep 4, 2026
CISA due date
—
The record
A flaw was found in Flatpak. A Time-of-check to time-of-use (TOCTOU) race condition exists in the `org.freedesktop.Flatpak.SystemHelper` component. This vulnerability occurs because a privileged `chmod` operation executes before the OSTree repository validation within the `Deploy()` function. An attacker can exploit this timing window to redirect symlinks to arbitrary files, potentially leading to unauthorized file manipulation or information disclosure.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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