CVE-2026-5536 FedML-AI FedML gRPC server grpc_server.py sendMessage deserialization
Remote attackers can exploit unsafe deserialization in the FedML gRPC server's sendMessage function to potentially execute arbitrary code.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-5536?
CVE-2026-5536 is a medium-severity unsafe deserialization vulnerability in FedML-AI FedML, published on 5 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A weakness has been identified in FedML-AI FedML up to 0.8.9. Affected is the function sendMessage of the file grpc_server.py of the component gRPC server. Executing a manipulation can lead to deserialization. The attack may be performed from remote. The vendor was contacted early about this disclosure but did not respond in any way.
Which versions are affected by CVE-2026-5536?
It affects 1 product.
Products include Tensoropera Fedml.
How do I fix CVE-2026-5536?
No fix has been published for CVE-2026-5536 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-2026-5536 being exploited?
There is no known exploitation of CVE-2026-5536 in the wild and no public exploit code.
Other vulnerabilities in FedML-AI FedML
Sources
Also known as GHSA-2fpx-xrc2-7qf3.