FoundationAgents MetaGPT: Deserialization through flawed argument mapping via Message.check_instruct_content()
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.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | metagpt | <= 0.8.2 | no fix |
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-10566
- https://github.com/FoundationAgents/MetaGPT/issues/2038
- https://github.com/FoundationAgents/MetaGPT
- https://vuldb.com/cve/CVE-2026-10566
- https://vuldb.com/submit/828301
- https://vuldb.com/vuln/367673
- https://vuldb.com/vuln/367673/cti
- https://pypi.org/project/metagpt
- https://github.com/advisories/GHSA-3c3g-7hwg-9qmr
- CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L- Weakness (CWE)
CWE-20- Platform
- Python (PyPI)
- Package
metagpt- Disclosed
- 02.06.2026
- Updated
- 11.10.2026 14:18
Sources and licenses
OSV / GitHub Advisory Database - PYSEC-2026-2637 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-3c3g-7hwg-9qmr - CC BY 4.0
Vulnerability history: metagpt
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 10
- First → latest
- 01.2024 06.2026
- Without a fix
- 8
- Exploited in attacks
- 0
Severity breakdown
- High 1
- Medium 6
- Low 3
Disclosures per year
- 2024: 1
- 2025: 0
- 2026: 9
-
FoundationAgents MetaGPT: Deserialization through flawed argument mapping via Message.check_instruct_content() this entry
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