CVE-2026-12530: Bedrock agentcore Improper Neutralization Of Argument Delimiters Vulnerability

HIGH
Advisory Identifier: GHSA-6rfw-mq36-jm8h
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CVSS 7.3
CWE-88
Published
Advisory Summary

CVE-2026-12530 is a HIGH (CVSS 7.3) improper neutralization of argument delimiters vulnerability (CWE-88: Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')) affecting Bedrock agentcore libraries in the PyPI ecosystem. The issue involves improper neutralization of argument delimiters in aws bedrock agentcore python sdk install_packages(). Remediation is available by upgrading affected packages to version 1.6.1.

CVE-2026-12530 at a Glance

CVE Identifier CVE-2026-12530
GHSA Identifier GHSA-6rfw-mq36-jm8h
Severity HIGH
CVSS v3.1 Base Score 7.3
CWE Classification CWE-88: Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')
Affected Product Bedrock agentcore
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:L/UI:R/S:U/C:H/I:H/A:N).

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

How to Fix CVE-2026-12530

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

bedrock-agentcore fixed: 1.6.1 
pip install bedrock-agentcore>=1.6.1
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 bedrock-agentcore

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2026-12530, inspect your installed packages using pip:

pip show bedrock-agentcore

Analyze the terminal output to locate any version of Bedrock agentcore in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.6.1), your application is affected.

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

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-88: Improper Neutralization of Argument Delimiters in a Command ('Argument Injection'), where the product constructs a string for a command to be executed by a separate component in another control sphere, but it does not properly delimit the intended arguments, options, or switches within that command string. In Bedrock agentcore, 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

### Summary The AWS Bedrock AgentCore Python SDK (bedrock-agentcore) is an open-source SDK that enables developers to build, deploy, and manage agents on AWS Bedrock AgentCore. An issue exists in the install_packages() method of the Code Interpreter client where crafted package name arguments can bypass input validation and allow a remote authenticated user to execute arbitrary commands within the Code Interpreter sandbox. ### Impact The install_packages() method constructs a 'pip install' shell command executed within the Code Interpreter sandbox using package name arguments provided by the caller. The method applied an incomplete blocklist that allowed crafted package name arguments - specifically pip flags such as '--index-url' and '-r' - to pass validation unchecked. A remote authenticated user who can influence the arguments passed to install_packages() could redirect package resolution to a third-party-controlled PyPI server, or expose the contents of arbitrary sandbox files and environment variables. **Impacted versions:** AWS Bedrock AgentCore Python SDK (bedrock-agentcore) versions >= 1.1.3 and < 1.6.1 ### Patches This issue has been addressed in bedrock-agentcore version 1.6.1. 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 unable to upgrade immediately, avoid passing any user-supplied or externally-influenced strings directly to install_packages(). Restrict calls to a fixed, hardcoded list of approved package names within your application code. ### References If you have any questions or comments about this advisory, we ask that you contact AWS Security via our [vulnerability reporting page](https://aws.amazon.com/security/vulnerability-reporting) or directly via email to [aws-security@amazon.com](mailto:aws-security@amazon.com). Please do not create a public GitHub issue. We would like to thank Sergio Garcia for collaborating on this issue through the coordinated vulnerability disclosure process.

CVE-2026-12530 Affected Bedrock agentcore Versions

1 component(s)
Fixed Versions:
1.6.1
Product / Package Ecosystem Affected Versions Fixed Version
bedrock-agentcore
pypi/bedrock-agentcore
PyPI
≥ 1.1.3
< 1.6.1
1.6.1

References

GitHub Advisory / Wiki ADVISORY
https://github.com/aws/bedrock-agentcore-sdk-python/security/advisories/GHSA-6rfw-mq36-jm8h
NVD — CVE-2026-12530 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-12530
Bedrock agentcore Security Information SECURITY
https://aws.amazon.com/security/security-bulletins/2026-044-aws
Bedrock agentcore Source Repository REPOSITORY
https://github.com/aws/bedrock-agentcore-sdk-python
pypi.org/project/bedrock-age... WEB
https://pypi.org/project/bedrock-agentcore/1.6.1

Frequently Asked Questions

What is CVE-2026-12530?
CVE-2026-12530 is a security vulnerability in Bedrock agentcore involving Improper neutralization of argument delimiters in AWS Bedrock AgentCore Python SDK install_packages() under CWE-88: Improper Neutralization of Argument Delimiters in a Command ('Argument Injection').
Which Bedrock agentcore versions are affected?
Affected versions include releases prior to 1.6.1 across affected packages: bedrock-agentcore.
What version fixes CVE-2026-12530?
Upgrading to 1.6.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is bedrock-agentcore affected?
Yes, bedrock-agentcore is affected in releases prior to 1.6.1. Upgrade your dependency to 1.6.1 or later.
What is the CVSS score of CVE-2026-12530?
CVE-2026-12530 has a CVSS v3.1 base score of 7.3 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N.
What CWE is associated with CVE-2026-12530?
CVE-2026-12530 is classified under CWE-88: Improper Neutralization of Argument Delimiters in a Command ('Argument Injection') (The product constructs a string for a command to be executed by a separate component in another control sphere, but it does not properly delimit the intended arguments, options, or switches within that command string.).
How can I check PyPI dependencies for CVE-2026-12530?
Run the dependency tree command: 'pip show bedrock-agentcore'. 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-6rfw-mq36-jm8h",
  "modified" : "2026-06-19T14:46:33Z",
  "published" : "2026-06-19T14:46:33Z",
  "aliases" : [ "CVE-2026-12530" ],
  "summary" : "Improper neutralization of argument delimiters in AWS Bedrock AgentCore Python SDK install_packages()",
  "details" : "### Summary\nThe AWS Bedrock AgentCore Python SDK (bedrock-agentcore) is an open-source SDK that enables developers to build, deploy, and manage agents on AWS Bedrock AgentCore. An issue exists in the install_packages() method of the Code Interpreter client where crafted package name arguments can bypass input validation and allow a remote authenticated user to execute arbitrary commands within the Code Interpreter sandbox.\n\n\n### Impact\nThe install_packages() method constructs a 'pip install' shell command executed within the Code Interpreter sandbox using package name arguments provided by the caller. The method applied an incomplete blocklist that allowed crafted package name arguments - specifically pip flags such as '--index-url' and '-r' - to pass validation unchecked. A remote authenticated user who can influence the arguments passed to install_packages() could redirect package resolution to a third-party-controlled PyPI server, or expose the contents of arbitrary sandbox files and environment variables.\n\n**Impacted versions:** AWS Bedrock AgentCore Python SDK (bedrock-agentcore) versions >= 1.1.3 and < 1.6.1\n\n### Patches\nThis issue has been addressed in bedrock-agentcore version 1.6.1. We recommend upgrading to the latest version and ensuring any forked or derivative code is patched to incorporate the new fixes. \n\n### Workarounds\nIf you are unable to upgrade immediately, avoid passing any user-supplied or externally-influenced strings directly to install_packages(). Restrict calls to a fixed, hardcoded list of approved package names within your application code.\n\n### References\nIf you have any questions or comments about this advisory, we ask that you contact AWS Security via our [vulnerability reporting page](https://aws.amazon.com/security/vulnerability-reporting) or directly via email to [aws-security@amazon.com](mailto:aws-security@amazon.com). Please do not create a public GitHub issue.\n\n\nWe would like to thank Sergio Garcia for collaborating on this issue through the coordinated vulnerability disclosure process.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N"
  }, {
    "type" : "CVSS_V4",
    "score" : "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"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "bedrock-agentcore"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.1.3"
      }, {
        "fixed" : "1.6.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/aws/bedrock-agentcore-sdk-python/security/advisories/GHSA-6rfw-mq36-jm8h"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-12530"
  }, {
    "type" : "WEB",
    "url" : "https://aws.amazon.com/security/security-bulletins/2026-044-aws"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/aws/bedrock-agentcore-sdk-python"
  }, {
    "type" : "WEB",
    "url" : "https://pypi.org/project/bedrock-agentcore/1.6.1"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-88" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-06-19T14:46:33Z",
    "nvd_published_at" : "2026-06-17T22:16:20Z"
  }
}