Vulnerability · Published May 24, 2026 · Assigned by mitre
CVE-2026-48831
High 7.3
In plain English
A high-severity security flaw in Wine from WineHQ. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 7% of all known vulnerabilities).
Official 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).
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | wine | no fix listed | DEBIAN-CVE-2026-48831 |
| Debian:13 | wine | no fix listed | DEBIAN-CVE-2026-48831 |
| Ubuntu:22.04:LTS | wine | no fix listed | UBUNTU-CVE-2026-48831 |
| Ubuntu:24.04:LTS | wine | no fix listed | UBUNTU-CVE-2026-48831 |
| Ubuntu:25.10 | wine | no fix listed | UBUNTU-CVE-2026-48831 |
| Ubuntu:26.04:LTS | wine | no fix listed | UBUNTU-CVE-2026-48831 |
| Ubuntu:26.10 | wine | no fix listed | UBUNTU-CVE-2026-48831 |
Affected products (as reported)
Weakness: CWE-669 · 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