CVE-2026-10566 MEDIUM

CVE-2026-10566: FoundationAgents MetaGPT schema.py Message.check_instruct_content deserialization

Vendor Foundationagents
Product MetaGPT
Weakness CWE-502 · Unsafe deserialization
Published June 2, 2026
Last update June 2, 2026

CVSS base score

4.8/10
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

What the vulnerability does

01Description

A weakness has been identified in FoundationAgents MetaGPT up to 0.8.2. This affects the function Message.check_instruct_content of the file metagpt/schema.py. Executing a manipulation of the argument mapping can lead to deserialization. The attack is restricted to local execution. The exploit has been made available to the public and could be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.

Key dates

02Disclosure timeline

June 2, 2026 CVE published
June 2, 2026 Record updated