CVE-2026-16796 - Improper neutralization of argument delimiters in AWS Bedrock AgentCore Python SDK install_packages()
CVE-2026-16796 is a vulnerability in the AWS Bedrock AgentCore Python SDK's install_packages() method that improperly neutralizes argument delimiters. This flaw allows a remote authenticated user to execute arbitrary commands within the Code Interpreter sandbox by crafting malicious package name arguments. The issue affects versions of bedrock-agentcore prior to 1.18.1. AWS has released version 1.18.1 to address this vulnerability. Users unable to upgrade should avoid passing untrusted input to install_packages() or validate package names strictly according to PyPI naming rules.
AI Analysis
Technical Summary
The AWS Bedrock AgentCore Python SDK includes a Code Interpreter client that installs Python packages into a managed sandbox environment. CVE-2026-16796 is caused by improper neutralization of argument delimiters in the install_packages() method, which may allow remote authenticated users to execute arbitrary commands inside the sandbox by supplying crafted package name arguments. This vulnerability affects all versions prior to 1.18.1. AWS has fixed the issue in version 1.18.1 and recommends upgrading to this version or later. As a workaround, users should avoid passing untrusted or model-generated input to install_packages() or validate package names against strict PyPI naming conventions.
Potential Impact
A remote authenticated attacker could exploit this vulnerability to execute arbitrary commands within the Code Interpreter sandbox environment, potentially leading to unauthorized code execution. The impact is limited to the sandbox context of the Code Interpreter client within the SDK. The severity is rated low by AWS.
Mitigation Recommendations
AWS has released bedrock-agentcore version 1.18.1 which addresses this vulnerability. Users should upgrade to version 1.18.1 or later to remediate the issue. If upgrading is not immediately possible, do not pass untrusted or model-generated input to the install_packages() method. For applications requiring dynamic package names, validate inputs strictly against PyPI naming rules, ensuring extras groups are limited to comma-separated identifiers before invoking the SDK.
CVE-2026-16796 - Improper neutralization of argument delimiters in AWS Bedrock AgentCore Python SDK install_packages()
Description
CVE-2026-16796 is a vulnerability in the AWS Bedrock AgentCore Python SDK's install_packages() method that improperly neutralizes argument delimiters. This flaw allows a remote authenticated user to execute arbitrary commands within the Code Interpreter sandbox by crafting malicious package name arguments. The issue affects versions of bedrock-agentcore prior to 1.18.1. AWS has released version 1.18.1 to address this vulnerability. Users unable to upgrade should avoid passing untrusted input to install_packages() or validate package names strictly according to PyPI naming rules.
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The AWS Bedrock AgentCore Python SDK includes a Code Interpreter client that installs Python packages into a managed sandbox environment. CVE-2026-16796 is caused by improper neutralization of argument delimiters in the install_packages() method, which may allow remote authenticated users to execute arbitrary commands inside the sandbox by supplying crafted package name arguments. This vulnerability affects all versions prior to 1.18.1. AWS has fixed the issue in version 1.18.1 and recommends upgrading to this version or later. As a workaround, users should avoid passing untrusted or model-generated input to install_packages() or validate package names against strict PyPI naming conventions.
Potential Impact
A remote authenticated attacker could exploit this vulnerability to execute arbitrary commands within the Code Interpreter sandbox environment, potentially leading to unauthorized code execution. The impact is limited to the sandbox context of the Code Interpreter client within the SDK. The severity is rated low by AWS.
Mitigation Recommendations
AWS has released bedrock-agentcore version 1.18.1 which addresses this vulnerability. Users should upgrade to version 1.18.1 or later to remediate the issue. If upgrading is not immediately possible, do not pass untrusted or model-generated input to the install_packages() method. For applications requiring dynamic package names, validate inputs strictly against PyPI naming rules, ensuring extras groups are limited to comma-separated identifiers before invoking the SDK.
Technical Details
- Article Source
- {"url":"https://aws.amazon.com/security/security-bulletins/rss/2026-065-aws/","fetched":true,"fetchedAt":"2026-07-23T20:20:21.133Z","wordCount":210}
Threat ID: 6a6277859c2644c7f8a6e8e4
Added to database: 07/23/2026, 20:20:21 UTC
Last enriched: 07/23/2026, 20:20:27 UTC
Last updated: 07/23/2026, 20:59:24 UTC
Views: 3
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