CVE-2026-6603: Agentscope AgentScope Vulnerable To Remote Code Vulnerability

MODERATE
Advisory Identifier: GHSA-cr24-fv3h-8cjm
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CVSS 7.3
CWE-74
Published
Advisory Summary

CVE-2026-6603 is a MODERATE (CVSS 7.3) agentscope vulnerable to remote code vulnerability (CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')) affecting Agentscope libraries in the PyPI ecosystem. The issue involves agentscope vulnerable to remote code injection. Remediation is available in the latest vendor maintenance releases.

CVE-2026-6603 at a Glance

CVE Identifier CVE-2026-6603
GHSA Identifier GHSA-cr24-fv3h-8cjm
Severity MODERATE
CVSS v3.1 Base Score 7.3
CWE Classification CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
Affected Product Agentscope
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 7.3

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability Low (A:L)

How to Fix CVE-2026-6603

To remediate this vulnerability, upgrade all affected Agentscope dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

agentscope fixed: Latest secure release 
pip install agentscope>=Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show agentscope

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2026-6603, inspect your installed packages using pip:

pip show agentscope

Analyze the terminal output to locate any version of Agentscope in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The pip show agentscope command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection'), where the product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component. In Agentscope, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

A vulnerability was determined in modelscope agentscope up to 1.0.18. Affected by this vulnerability is the function execute_python_code/execute_shell_command of the file src/AgentScope/tool/_coding/_python.py. This manipulation causes code injection. The attack is possible to be carried out remotely. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.

CVE-2026-6603 Affected Agentscope Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
agentscope
pypi/agentscope
PyPI
≤ 1.0.18

References

NVD — CVE-2026-6603 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-6603
Agentscope Source Repository REPOSITORY
https://gist.github.com/YLChen-007/c084d69aaeda6729f3988603f2b0ce6e
Agentscope Source Repository REPOSITORY
https://github.com/agentscope-ai/agentscope
vuldb.com/submit/792223 WEB
https://vuldb.com/submit/792223
vuldb.com/vuln/358238 WEB
https://vuldb.com/vuln/358238
vuldb.com/vuln/358238/cti WEB
https://vuldb.com/vuln/358238/cti

Frequently Asked Questions

What is CVE-2026-6603?
CVE-2026-6603 is a security vulnerability in Agentscope involving AgentScope Vulnerable to Remote Code Injection under CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection').
Which Agentscope versions are affected?
Affected versions include releases prior to current release patches across affected packages: agentscope.
What version fixes CVE-2026-6603?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is agentscope affected?
Yes, agentscope is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2026-6603?
CVE-2026-6603 has a CVSS v3.1 base score of 7.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.
What CWE is associated with CVE-2026-6603?
CVE-2026-6603 is classified under CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') (The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.).
How can I check PyPI dependencies for CVE-2026-6603?
Run the dependency tree command: 'pip show agentscope'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-cr24-fv3h-8cjm",
  "modified" : "2026-04-30T18:37:10Z",
  "published" : "2026-04-20T06:31:27Z",
  "aliases" : [ "CVE-2026-6603" ],
  "summary" : "AgentScope Vulnerable to Remote Code Injection",
  "details" : "A vulnerability was determined in modelscope agentscope up to 1.0.18. Affected by this vulnerability is the function execute_python_code/execute_shell_command of the file src/AgentScope/tool/_coding/_python.py. This manipulation causes code injection. The attack is possible to be carried out remotely. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS: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"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "agentscope"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "1.0.18"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-6603"
  }, {
    "type" : "WEB",
    "url" : "https://gist.github.com/YLChen-007/c084d69aaeda6729f3988603f2b0ce6e"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/agentscope-ai/agentscope"
  }, {
    "type" : "WEB",
    "url" : "https://vuldb.com/submit/792223"
  }, {
    "type" : "WEB",
    "url" : "https://vuldb.com/vuln/358238"
  }, {
    "type" : "WEB",
    "url" : "https://vuldb.com/vuln/358238/cti"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-74" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-04-30T18:37:10Z",
    "nvd_published_at" : "2026-04-20T05:16:15Z"
  }
}