CVE-2026-48831

Wine MIME handler can execute Windows executables with user privileges, allowing Flatpak/Snap sandbox escape

Published May 24, 2026 CVSS 4.0 · 7.3 High EPSS < 1% KEV · Not listed
Description
Wine ships a .desktop file that registers itself as a MIME handler for EXE files and several other Windows executable file types. In some configurations, handling of an EXE file causes that file to be blindly executed with the permissions of the invoker. This allows escaping Flatpak and Snap sandboxes, because MIME handlers are not intended for use by code interpreters and loaders. NOTE: some parties feel that this is not a bug to be addressed in Wine, because there is no known solution that avoids a severe loss of usability (Wine could be a binfmt-misc handler, but binfmt-misc does not exist on all platforms supported by Wine).

Remediation

Vendor Workaround

Remove /usr/share/applications/wine.desktop from the system to unregister the MIME handler that introduces the vulnerability.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

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

Type Values Removed Values Added
Title Wine MIME handler can execute Windows executables with user privileges, allowing Flatpak/Snap sandbox escape
Type Values Removed Values Added
Description Wine ships a .desktop file that registers itself as a MIME handler for EXE files and several other Windows executable file types. In some configurations, handling of an EXE file causes that file to be blindly executed with the permissions of the invoker. This allows escaping Flatpak and Snap sandboxes, because MIME handlers are not intended for use by code interpreters and loaders. NOTE: some parties feel that this is not a bug to be addressed in Wine, because there is no known solution that avoids a severe loss of usability (Wine could be a binfmt-misc handler, but binfmt-misc does not exist on all platforms supported by Wine).
First Time appeared Winehq
Winehq wine
Weaknesses CWE-669
CPEs cpe:2.3:a:winehq:wine:*:*:*:*:*:*:*:*
Vendors & Products Winehq
Winehq wine
References
Metrics cvssV4_0

{'score': 7.3, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/AU:N/V:D/U:Clear'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
May 27, 2026, 3:55 AM
Reserved
May 24, 2026, 8:52 PM
Status
Deferred
Published
May 24, 2026, 10:16 PM
Modified
Jul 23, 2026, 5:10 PM