CVE-2026-10566

FoundationAgents MetaGPT schema.py Message.check_instruct_content deserialization

Published Jun 2, 2026 CVSS 4.0 · 4.8 Medium EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-3c3g-7hwg-9qmr FoundationAgents MetaGPT: Deserialization through flawed argument mapping via Message.check_instruct_content()
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Foundation Agents
Foundation Agents metagpt
Vendors & Products Foundation Agents
Foundation Agents metagpt
Type Values Removed Values Added
Description 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.
Title FoundationAgents MetaGPT schema.py Message.check_instruct_content deserialization
First Time appeared Foundationagents
Foundationagents metagpt
Weaknesses CWE-20
CWE-502
CPEs cpe:2.3:a:foundationagents:metagpt:*:*:*:*:*:*:*:*
Vendors & Products Foundationagents
Foundationagents metagpt
References
Metrics cvssV2_0

{'score': 4.3, 'vector': 'AV:L/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR'}

cvssV3_0

{'score': 5.3, 'vector': 'CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R'}

cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R'}

cvssV4_0

{'score': 4.8, '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulDB
Published
Updated
Jun 2, 2026, 12:24 PM
Reserved
Jun 1, 2026, 4:34 PM
Status
Deferred
Published
Jun 2, 2026, 3:16 AM
Modified
Jul 22, 2026, 7:10 PM