CVE-2026-76925
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.
Scoring
- Severity
- MEDIUM
- CVSS base score
- 5.8
- CVSS vector
- CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:L
- EPSS probability
- 0.10%
- CWE
- CWE-367
- Published
- 2026-09-04
- Last modified
- 2026-09-08
Weakness type
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