CVE-2026-5971Public exploitNetwork attack vector

Code execution via eval of LLM output

Published Apr 9, 2026 · Updated Apr 9, 2026

Code injection in MetaGPT 0.8.0 through 0.8.1 allows remote attackers to execute Python code through manipulated LLM output. The ActionNode.xml_fill method extracts list or dictionary fields from XML-formatted model responses and passes their raw text directly to eval(). Exploitation requires control over, or successful prompt injection into, an LLM response processed by such a field and executes with the MetaGPT process's privileges.

CVSS severity9.8
Critical
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in MetaGPT 0.8.0 through 0.8.1 allows remote attackers to execute Python code through manipulated LLM output. The ActionNode.xml_fill method extracts list or dictionary fields from XML-formatted model responses and passes their raw text directly to eval(). Exploitation requires control over, or successful prompt injection into, an LLM response processed by such a field and executes with the MetaGPT process's privileges.

The record

CVE
CVE-2026-5971
Published
Apr 9, 2026
Updated
Apr 9, 2026
Vendor
Foundation Agents
Product
MetaGPT
Classifications
CWE-95, CWE-94, T1059.006
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0.8.0
  2. Affected versionversion=0.8.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Foundation Agents · MetaGPTversion=0.8.0; version=0.8.1

Published CVSS scores

5.5VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-95Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')
CWE-94Improper Control of Generation of Code ('Code Injection')
T1059.006Python

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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