CVE-2026-50515 Azure Service Bus Remote Code Execution Vulnerability
An authorized attacker can execute arbitrary code via unsafe deserialization in Azure Service Bus, requiring immediate patching.
- 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-2026-50515?
CVE-2026-50515 is a critical unsafe deserialization vulnerability in Microsoft Azure Service Bus, published on 6 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Deserialization of untrusted data in Azure Service Bus allows an authorized attacker to execute code over a network.
Weakness: CWE-502
Which versions are affected by CVE-2026-50515?
It affects 1 product.
Products include Microsoft Azure Service Bus.
How do I fix CVE-2026-50515?
No fix has been published for CVE-2026-50515 yet. Limit exposure of the affected software until one is available.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2026-50515 being exploited?
There is no known exploitation of CVE-2026-50515 in the wild and no public exploit code.
Sources
Also known as GHSA-fm3h-q54v-rjrj.