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

Source: https://junglewise.ai/threats/cve-2026-119848-improper-input-validation-in-windows-message-queuing-allows-an  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-10. Updated: 2026-11-10  
License: CC BY 4.0 with a link back

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](https://junglewise.ai/threats/technologies/windows-message-queuing). Vendors: [Microsoft](https://junglewise.ai/threats/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

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-119848](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-119848)

## Related threats

- [Windows Message Queuing use after free in Queue Manager](https://junglewise.ai/threats/cve-2026-119967-use-after-free-in-windows-message-queuing-queue-manager-allows)
- [Windows Message Queuing double free](https://junglewise.ai/threats/cve-2026-119964-double-free-in-windows-message-queuing-allows-an-unauthorized)
- [Windows Message Queuing double free remote code execution](https://junglewise.ai/threats/cve-2026-119963-double-free-in-windows-message-queuing-allows-an-unauthorized)
- [Windows Message Queuing privilege escalation via untrusted pointer dereference](https://junglewise.ai/threats/cve-2026-119833-untrusted-pointer-dereference-in-windows-message-queuing-allows)
- [Microsoft Windows Message Queuing privilege escalation](https://junglewise.ai/threats/cve-2026-118126-use-after-free-in-windows-message-queuing-allows-an-authorized)