CVE-2026-90614

FedML-AI FedML MQTT+S3 Communication Backend remote_storage.py S3Storage.read_model deserialization

State: Published
Severity: 5.3 Medium
Published: Sep 14, 2026
Updated: Sep 14, 2026
Reserved: Sep 12, 2026

Description

A weakness has been identified in FedML-AI FedML up to 0.9.6. Affected by this issue is the function S3Storage.read_model of the file fedml/core/distributed/communication/s3/remote_storage.py of the component MQTT+S3 Communication Backend. This manipulation of the argument s3_key_str causes deserialization. Remote exploitation of the attack is possible. The project was informed of the problem early through an issue report but has not responded yet.

Scores

CVSS	Score	Vector	Source
4.0	5.3 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X	VulDB
3.1	6.3 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:X/RL:X/RC:R	VulDB
3.0	6.3 Medium	CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:X/RL:X/RC:R	VulDB
2.0	6.5 Medium	AV:N/AC:L/Au:S/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	0.9.0Affected 0.9.1Affected 0.9.2Affected 0.9.3Affected 0.9.4Affected 0.9.5Affected 0.9.6Affected

References

VDB-403196 | FedML-AI FedML MQTT+S3 Communication Backend remote_storage.py S3Storage.read_model deserializationvdb-entrytechnical-description
VDB-403196 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
CVE-2026-90614 | CVE Analysis and Reportthird-party-advisory
Submit #914219 | FedML-AI FedML 0.9.6 Deserializationthird-party-advisory
https://github.com/FedML-AI/FedML/issues/2267issue-tracking
https://github.com/FedML-AI/FedML/product

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