{"id":"PYSEC-2026-2395","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 \u003e= 1.1.3 and \u003c 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.","aliases":["CVE-2026-12530","GHSA-6rfw-mq36-jm8h"],"modified":"2026-07-13T16:31:38.512646619Z","published":"2026-07-13T15:46:21.228207Z","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"},{"type":"PACKAGE","url":"https://pypi.org/project/bedrock-agentcore"},{"type":"ADVISORY","url":"https://github.com/advisories/GHSA-6rfw-mq36-jm8h"}],"affected":[{"package":{"name":"bedrock-agentcore","ecosystem":"PyPI","purl":"pkg:pypi/bedrock-agentcore"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.1.3"},{"fixed":"1.6.1"}]}],"versions":["1.1.3","1.1.4","1.1.5","1.2.0","1.2.1","1.3.0","1.3.1","1.3.2","1.3.3","1.4.0","1.4.1","1.4.2","1.4.3","1.4.4","1.4.5","1.4.6","1.4.7","1.4.8","1.5.0","1.5.1","1.6.0"],"database_specific":{"source":"https://github.com/pypa/advisory-database/blob/main/vulns/bedrock-agentcore/PYSEC-2026-2395.yaml"}}],"schema_version":"1.7.5","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"}]}