Deserialization in Foundationagents Metagpt
CVE-2026-10566
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.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.001 (2.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 2nd percentile — 2.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000
Affected products
- Foundationagents Metagpt — versions 0.8.0, 0.8.1, 0.8.2
Weakness classification (CWE)
References
- vuldb.com/vuln/367673 (technical-description, vdb-entry)
- vuldb.com/vuln/367673/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-10566 (third-party-advisory)
- vuldb.com/submit/828301 (third-party-advisory)
- github.com/FoundationAgents/MetaGPT/issues/2038 (issue-tracking, exploit)
- github.com/FoundationAgents/MetaGPT/ (product)
Frequently asked questions
- What is CVE-2026-10566?
- CVE-2026-10566 is a medium-severity vulnerability in Foundationagents Metagpt, classified under Improper Input Validation. CVSS score: 5.3/10. Published 2026-06-02.
- How severe is CVE-2026-10566?
- Medium severity. CVSS v3 base score is 5.3 out of 10.