Vulnerability · Published Apr 5, 2026 · Assigned by VulDB
CVE-2026-5536FedML-AI FedML gRPC server grpc_server.py sendMessage deserialization
High 7.3
In plain English
A high-severity unsafe deserialization in FedML from FedML-AI. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 33% of all known vulnerabilities).
Severity (CVSS 3.1)7.3High
Exploit odds (30 days)0.4%top 67.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
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.
Affected products (as reported)
Weakness: CWE-502, CWE-20 · Vector: 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
References
- VDB-355289 | FedML-AI FedML gRPC server grpc_server.py sendMessage deserialization vdb-entry, technical-description
- VDB-355289 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
- Submit #782201 | FedML-AI FedML <= 0.8.9 Remote Code Execution third-party-advisory
- https://github.com/AnalogyC0de/public_exp/issues/26 issue-tracking