AWS Bedrock AgentCore: Improper neutralization of argument delimiters in the Python SDK install_packages()
Summary
The AWS Bedrock AgentCore Python SDK (bedrock-agentcore) provides tools for building AI agents, including a Code Interpreter client that installs Python packages into a managed sandbox. An issue exists where, under certain circumstances, improper neutralization of argument delimiters in the install_packages() method allows a remote authenticated user to execute arbitrary commands within the Code Interpreter sandbox via crafted package name arguments.
Impact
Insufficient input validation in install_packages() allows specially crafted package specifiers to bypass validation and achieve arbitrary command execution within the sandbox. A remote authenticated user who can influence the arguments to install_packages() can execute arbitrary commands within the Code Interpreter sandbox environment.
Impacted Versions
< 1.18.1
Patches
This issue has been addressed in bedrock-agentcore version 1.18.1. We recommend upgrading to the latest version and ensuring any forked or derivative code is patched to incorporate the new fixes.
Workarounds
If you are not able to upgrade, do not pass untrusted or model-generated input to install_packages(). Applications that must accept dynamic package names should validate them against strict PyPI naming rules -- including constraining any extras group to comma-separated identifiers -- before calling the SDK.
References
If you have any questions or comments about this advisory, AWS asks that you contact AWS Security via the vulnerability reporting page or directly via email to aws-security@amazon.com. Please do not create a public GitHub issue.
Acknowledgement
AWS would like to thank Sergio Garcia (@MrCloudSec) for collaborating on this issue through the coordinated issue disclosure process.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | bedrock-agentcore | < 1.18.1 | 1.18.1 |
References
- https://github.com/aws/bedrock-agentcore-sdk-python/security/advisories/GHSA-j6g5-3hh3-pgw8
- https://nvd.nist.gov/vuln/detail/CVE-2026-16796
- https://github.com/aws/bedrock-agentcore-sdk-python/pull/581
- https://github.com/aws/bedrock-agentcore-sdk-python/commit/3c4b4ee6b8730e6313a82c743ac37dbcc1c21cdb
- https://aws.amazon.com/security/security-bulletins/2026-065-aws
- https://github.com/aws/bedrock-agentcore-sdk-python
- https://pypi.org/project/bedrock-agentcore/1.18.1
- https://pypi.org/project/bedrock-agentcore
- https://github.com/advisories/GHSA-j6g5-3hh3-pgw8
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N- Weakness (CWE)
CWE-88- Platform
- Python (PyPI)
- Package
bedrock-agentcore- Disclosed
- 24.07.2026
- Updated
- 11.10.2026 14:19
Sources and licenses
OSV / GitHub Advisory Database - PYSEC-2026-3551 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-j6g5-3hh3-pgw8 - CC BY 4.0
Vulnerability history: bedrock-agentcore
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
- 2
- First → latest
- 06.2026 07.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 2
Disclosures per year
- 2026: 2
-
AWS Bedrock AgentCore: Improper neutralization of argument delimiters in the Python SDK install_packages() this entry
Know which vulnerabilities affect your application
With the DockRay integration and software inventory enabled, DockRay checks reported component versions against known vulnerabilities and notifies you about confirmed matches. Coverage depends on the supported technology and available advisory data.