CVE-2026-56642 Microsoft Fabric Data Warehouse Remote Code Execution Vulnerability
An authorized attacker can execute arbitrary code via a stack-based buffer overflow in Microsoft Fabric Data Warehouse.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-56642?
CVE-2026-56642 is a high-severity memory corruption vulnerability in Microsoft Service Fabric, published on 14 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Stack-based buffer overflow in Microsoft Fabric Data Warehouse allows an authorized attacker to execute code over a network.
Weakness: CWE-121
Which versions are affected by CVE-2026-56642?
It affects 1 product.
Products include Microsoft Fabric Data Warehouse.
How do I fix CVE-2026-56642?
No fix has been published for CVE-2026-56642 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-56642 being exploited?
There is no known exploitation of CVE-2026-56642 in the wild and no public exploit code.
Sources
Also known as GHSA-m474-xrpw-p6pj.