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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.

PUBLISHED Reserved 2026-04-04 | Published 2026-04-05 | Updated 2026-04-06 | Assigner VulDB




MEDIUM: 6.9CVSS: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
HIGH: 7.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:X/RL:X/RC:R
HIGH: 7.3CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:X/RL:X/RC:R
7.5AV:N/AC:L/Au:N/C:P/I:P/A:P/E:ND/RL:ND/RC:UR

Problem types

Deserialization

Improper Input Validation

Product status

0.8.0
affected

0.8.1
affected

0.8.2
affected

0.8.3
affected

0.8.4
affected

0.8.5
affected

0.8.6
affected

0.8.7
affected

0.8.8
affected

0.8.9
affected

Timeline

2026-04-04:Advisory disclosed
2026-04-04:VulDB entry created
2026-04-04:VulDB entry last update

Credits

Ana10gy (VulDB User) reporter

VulDB CNA Team coordinator

References

vuldb.com/vuln/355289 (VDB-355289 | FedML-AI FedML gRPC server grpc_server.py sendMessage deserialization) vdb-entry technical-description

vuldb.com/vuln/355289/cti (VDB-355289 | CTI Indicators (IOB, IOC, IOA)) signature permissions-required

vuldb.com/submit/782201 (Submit #782201 | FedML-AI FedML <= 0.8.9 Remote Code Execution) third-party-advisory

github.com/AnalogyC0de/public_exp/issues/26 issue-tracking

cve.org (CVE-2026-5536)

nvd.nist.gov (CVE-2026-5536)

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