id: PYSEC-2026-2637
published: "2026-07-13T15:46:13.813271Z"
modified: "2026-07-13T16:04:50.983678Z"
aliases:
- CVE-2026-10566
- GHSA-3c3g-7hwg-9qmr
summary: " FoundationAgents MetaGPT: Deserialization through flawed argument mapping via Message.check_instruct_content()"
details: 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:
- package:
    name: metagpt
    ecosystem: PyPI
    purl: pkg:pypi/metagpt
  ranges:
  - type: ECOSYSTEM
    events:
    - introduced: "0"
    - last_affected: 0.8.2
  versions:
  - "0.1"
  - 0.3.0
  - 0.4.0
  - 0.5.0
  - 0.5.1
  - 0.5.2
  - 0.6.0
  - 0.6.1
  - 0.6.10
  - 0.6.11
  - 0.6.12
  - 0.6.13
  - 0.6.2
  - 0.6.3
  - 0.6.4
  - 0.6.5
  - 0.6.6
  - 0.6.7
  - 0.6.8
  - 0.6.9
  - 0.7.0
  - 0.7.1
  - 0.7.2
  - 0.7.3
  - 0.7.4
  - 0.7.6
  - 0.7.7
  - 0.8.0
  - 0.8.1
  - 0.8.2
references:
- type: ADVISORY
  url: https://nvd.nist.gov/vuln/detail/CVE-2026-10566
- type: WEB
  url: https://github.com/FoundationAgents/MetaGPT/issues/2038
- type: PACKAGE
  url: https://github.com/FoundationAgents/MetaGPT
- type: WEB
  url: https://vuldb.com/cve/CVE-2026-10566
- type: WEB
  url: https://vuldb.com/submit/828301
- type: WEB
  url: https://vuldb.com/vuln/367673
- type: WEB
  url: https://vuldb.com/vuln/367673/cti
- type: PACKAGE
  url: https://pypi.org/project/metagpt
- type: ADVISORY
  url: https://github.com/advisories/GHSA-3c3g-7hwg-9qmr
severity:
- type: CVSS_V3
  score: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
- type: CVSS_V4
  score: 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