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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.

PUBLISHED Reserved 2026-06-01 | Published 2026-06-02 | Updated 2026-06-02 | Assigner VulDB




MEDIUM: 4.8CVSS: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
MEDIUM: 5.3CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
MEDIUM: 5.3CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
4.3AV:L/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR

Problem types

Deserialization

Improper Input Validation

Product status

0.8.0
affected

0.8.1
affected

0.8.2
affected

Timeline

2026-06-01:Advisory disclosed
2026-06-01:VulDB entry created
2026-06-01:VulDB entry last update

Credits

ASUKA39 (VulDB User) reporter

VulDB CNA Team coordinator

References

vuldb.com/vuln/367673 (VDB-367673 | FoundationAgents MetaGPT schema.py Message.check_instruct_content deserialization) vdb-entry technical-description

vuldb.com/vuln/367673/cti (VDB-367673 | CTI Indicators (IOB, IOC, IOA)) signature permissions-required

vuldb.com/cve/CVE-2026-10566 (CVE-2026-10566 | CVE Analysis and Report) third-party-advisory

vuldb.com/submit/828301 (Submit #828301 | FoundationAgents MetaGPT 0.8.2 Deserialization) third-party-advisory

github.com/FoundationAgents/MetaGPT/issues/2038 exploit issue-tracking

github.com/FoundationAgents/MetaGPT/ product

cve.org (CVE-2026-10566)

nvd.nist.gov (CVE-2026-10566)

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