CVE-2026-5536

HighCVSS 7.3

Published: 05/04/2026(UTC)Updated: 24/07/2026(UTC)Translated: 25/07/2026(UTC)NVD NIST

Exploitation Probability (EPSS)

Low risk

0.38%

30th percentile - higher than 30% of all known CVEs

Summary

FedML-AI FedML up to version 0.8.9 contains a deserialization vulnerability in the sendMessage function of the grpc_server.py file in the gRPC server component. Remote attackers can perform manipulation leading to deserialization, potentially enabling arbitrary code execution.

Risk Assessment

The risk involves remote code execution via deserialization, potentially leading to full compromise of the FedML server.

Recommendation

Update FedML to a version newer than 0.8.9 or apply temporary mitigations such as restricting access to the gRPC server.

Other vulnerabilities in FedML

CVE-2026-5535Medium
FedML-AI FedML versions up to 0.8.9 contain a path traversal vulnerability in the MQTT Message Handler component in FileUtils.java. An attacker can remotely manipulate the dataSet argument, leading to access to files outside the allowed directory.

Original NVD description (English source)

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.