CVE-2026-48831

Sandbox escape via executable MIME handler

Published May 24, 2026 · Updated May 24, 2026

Sandbox escape in Wine 0.9 through 11.0 allows local users to run Windows executables outside Flatpak or Snap confinement via desktop MIME handling. The loader/wine.desktop entry registers executable MIME types and sends a selected file to wine start /unix, which loads it as code rather than data. Exploitation requires an unsandboxed Wine handler, and automatic execution requires Wine to be the only handler; resulting code receives the invoker's host permissions.

CVSS severity7.3
High
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Sandbox escape in Wine 0.9 through 11.0 allows local users to run Windows executables outside Flatpak or Snap confinement via desktop MIME handling. The loader/wine.desktop entry registers executable MIME types and sends a selected file to wine start /unix, which loads it as code rather than data. Exploitation requires an unsandboxed Wine handler, and automatic execution requires Wine to be the only handler; resulting code receives the invoker's host permissions.

The record

CVE
CVE-2026-48831
Published
May 24, 2026
Updated
May 24, 2026
Vendor
WineHQ
Product
Wine
Classifications
CWE-669, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 24, 2026CVE publishedPublication date reported by the CVE source.
  2. May 24, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0.9 <=11.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

WineHQ · Wineversion=0.9 <=11.0

Published CVSS scores

7.3MITRECVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-669Incorrect Resource Transfer Between Spheres
T1204.002User Execution: Malicious File

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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