CVE-2026-5536

FedML-AI FedML gRPC server grpc_server.py sendMessage deserialization

State: Published
Severity: 6.9 Medium
Published: Apr 5, 2026
Updated: Apr 6, 2026
Reserved: Apr 4, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	6.9 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X	VulDB
3.1	7.3 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:X/RL:X/RC:R	VulDB
3.0	7.3 High	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:X/RL:X/RC:R	VulDB
2.0	7.5 High	AV:N/AC:L/Au:N/C:P/I:P/A:P/E:ND/RL:ND/RC:UR	VulDB

Weaknesses

CWE-502 Deserialization
CWE-20 Improper Input Validation

Affected Products

Product	Versions
FedMLFedML-AI	0.8.0Affected 0.8.1Affected 0.8.2Affected 0.8.3Affected 0.8.4Affected 0.8.5Affected 0.8.6Affected 0.8.7Affected 0.8.8Affected 0.8.9Affected

References

VDB-355289 | FedML-AI FedML gRPC server grpc_server.py sendMessage deserializationvdb-entrytechnical-description
VDB-355289 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
Submit #782201 | FedML-AI FedML <= 0.8.9 Remote Code Executionthird-party-advisory
https://github.com/AnalogyC0de/public_exp/issues/26issue-tracking

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