Vulnerability-Lookup

CVE-2026-16796 (GCVE-0-2026-16796)

Vulnerability from cvelistv5 – Published: 2026-07-23 20:06 – Updated: 2026-07-24 13:34

Title

Improper neutralization of argument delimiters in AWS Bedrock AgentCore Python SDK install_packages()

Summary

Improper neutralization of argument delimiters in the install_packages() method in AWS Bedrock AgentCore Python SDK before 1.18.1 might allow a remote authenticated user to execute arbitrary commands within the Code Interpreter sandbox via crafted package name arguments. To mitigate this issue, users should upgrade to the patched version 1.18.1.

Severity

7.3 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N

8.4 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator (v2.0.3)

CWE

CWE-88 - Improper neutralization of argument delimiters in a command ('argument injection')

Assigner

AMZN

References

3 references

URL	Tags
https://pypi.org/project/bedrock-agentcore/1.18.1/	release-notespatch
https://aws.amazon.com/security/security-bulletin…	vendor-advisory
https://github.com/aws/bedrock-agentcore-sdk-pyth…	release-notes

Impacted products

1 product

Vendor	Product	Version
AWS	bedrock-agentcore 1.18.1	Affected: 0 , < 1.18.1 (custom)

Credits

BeyondTrust Phantom Labs

Show details on NVD website

JSON

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GHSA-J6G5-3HH3-PGW8

Vulnerability from github – Published: 2026-07-24 22:38 – Updated: 2026-07-24 22:38

Summary

AWS Bedrock AgentCore: Improper neutralization of argument delimiters in the Python SDK install_packages()

Details

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.

Severity

7.3 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N

8.4 (High)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

Show details on source website

JSON

To clipboard

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  },
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  "modified": "2026-07-24T22:38:56Z",
  "published": "2026-07-24T22:38:56Z",
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      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-16796"
    },
    {
      "type": "WEB",
      "url": "https://github.com/aws/bedrock-agentcore-sdk-python/pull/581"
    },
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      "type": "WEB",
      "url": "https://github.com/aws/bedrock-agentcore-sdk-python/commit/3c4b4ee6b8730e6313a82c743ac37dbcc1c21cdb"
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  "summary": "AWS Bedrock AgentCore: Improper neutralization of argument delimiters in the Python SDK install_packages()"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

CVE-2026-16796 (GCVE-0-2026-16796)

GHSA-J6G5-3HH3-PGW8

Summary

Impact

Impacted Versions

Patches

Workarounds

References

Acknowledgement

Tags

Sightings

Nomenclature