CVE-2026-119848: Windows Message Queuing improper input validation DoS

CVE-2026-119848 · Severity: medium · CVSS 5.3 · Published 2026-11-10

Windows Message Queuing, a system component that handles asynchronous messaging between applications, contains an input validation flaw. An authorized attacker can exploit this vulnerability to disrupt message processing and cause denial of service on a network, preventing legitimate applications from communicating through the queue.

Technologies: Microsoft Windows Message Queuing. Vendors: Microsoft.

Quick answers

Is CVE-2026-119848 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-119848 being exploited in the wild.
How severe is CVE-2026-119848?
Medium severity, with a CVSS score of 5.3, published 10 November 2026.
Which products and versions are affected?
Microsoft Windows Message Queuing.
Is there a fix for CVE-2026-119848?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-119848 attacked?
It is attacked over the network, in an operating system.
Am I affected by CVE-2026-119848?
Check whether you run Microsoft Windows Message Queuing. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

Improper input validation in Windows Message Queuing fails to sanitize untrusted message data, allowing an authorized network attacker to trigger a denial-of-service condition. The vulnerability requires existing authentication or authorization credentials to exploit. A fix is available from Microsoft.

Affected products

  • Microsoft Windows Message Queuing

Timeline

  • 2026-11-10: disclosed

References

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