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.
History

Tue, 08 Sep 2026 14:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 04 Sep 2026 21:30:00 +0000

Type Values Removed Values Added
Description No description is available for this CVE. 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.
Title flatpak: Flatpak: TOCTOU race condition allows symlink redirection Flatpak: flatpak: toctou race condition allows symlink redirection
First Time appeared Redhat
Redhat enterprise Linux
CPEs cpe:/o:redhat:enterprise_linux:10
cpe:/o:redhat:enterprise_linux:7
cpe:/o:redhat:enterprise_linux:8
cpe:/o:redhat:enterprise_linux:9
Vendors & Products Redhat
Redhat enterprise Linux
References

Fri, 04 Sep 2026 12:15:00 +0000

Type Values Removed Values Added
Description No description is available for this CVE.
Title flatpak: Flatpak: TOCTOU race condition allows symlink redirection
Weaknesses CWE-367
References
Metrics threat_severity

None

cvssV3_1

{'score': 5.8, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:L'}

threat_severity

Moderate


cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published: 2026-09-04T21:02:00.079Z

Updated: 2026-09-08T13:00:37.367Z

Reserved: 2026-08-19T22:57:38.204Z

Link: CVE-2026-76925

cve-icon Vulnrichment

Updated: 2026-09-08T13:00:33.968Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-04T22:17:18.190

Modified: 2026-09-08T19:08:15.590

Link: CVE-2026-76925

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-08-19T00:00:00Z

Links: CVE-2026-76925 - Bugzilla