{"id":"CVE-2026-16796","aliases":["EUVD-2026-48422","GHSA-j6g5-3hh3-pgw8","PYSEC-2026-3551"],"status":"published","title":"Improper neutralization of argument delimiters in AWS Bedrock AgentCore Python SDK install_packages()","description":"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.\n\n\n\nTo mitigate this issue, users should upgrade to the patched version 1.18.1.","severity":{"version":"4.0","score":8.4,"vector":"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","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00725,"percentile":0.54552,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-88"],"published":"2026-07-23T20:06:32Z","modified":"2026-10-28T02:30:58Z","fixes":[{"ecosystem":"PyPI","package":"bedrock-agentcore","fixed_in":["1.18.1"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"PyPI","package":"bedrock-agentcore","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.18.1"}]}]},{"source":"osv","ecosystem":"PyPI","package":"bedrock-agentcore","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.18.1"}]}],"versions":["0.0.1","0.1.0","0.1.1","0.1.2","0.1.3","0.1.4","0.1.5","0.1.6","0.1.7","1.0.0","1.0.2","1.0.3","1.0.4","1.0.5","1.0.6","1.0.7","1.1.0","1.1.1","1.1.2","1.1.3","1.1.4","1.1.5","1.10.0","1.11.0","1.12.0","1.13.0","1.14.0","1.14.1","1.15.0","1.15.1","1.16.0","1.17.0","1.18.0","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","1.6.1","1.6.2","1.6.3","1.6.4","1.7.0","1.8.0","1.9.0","1.9.1"]},{"source":"osv","ecosystem":"PyPI","package":"bedrock-agentcore","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.18.1"}]}],"versions":["0.0.1","0.1.0","0.1.1","0.1.2","0.1.3","0.1.4","0.1.5","0.1.6","0.1.7","1.0.0","1.0.2","1.0.3","1.0.4","1.0.5","1.0.6","1.0.7","1.1.0","1.1.1","1.1.2","1.1.3","1.1.4","1.1.5","1.10.0","1.11.0","1.12.0","1.13.0","1.14.0","1.14.1","1.15.0","1.15.1","1.16.0","1.17.0","1.18.0","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","1.6.1","1.6.2","1.6.3","1.6.4","1.7.0","1.8.0","1.9.0","1.9.1"]}],"products":[{"vendor":"aws","product":"bedrock-agentcore 1.18.1"}],"references":[{"url":"https://pypi.org/project/bedrock-agentcore/1.18.1/","tags":["release-notes","patch","fix"]},{"url":"https://aws.amazon.com/security/security-bulletins/2026-065-aws/","tags":["vendor-advisory","advisory"]},{"url":"https://github.com/aws/bedrock-agentcore-sdk-python/security/advisories/GHSA-j6g5-3hh3-pgw8","tags":["release-notes","advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-16796","tags":["advisory"]},{"url":"https://github.com/aws/bedrock-agentcore-sdk-python/pull/581","tags":["web"]},{"url":"https://github.com/aws/bedrock-agentcore-sdk-python/commit/3c4b4ee6b8730e6313a82c743ac37dbcc1c21cdb","tags":["web"]},{"url":"https://aws.amazon.com/security/security-bulletins/2026-065-aws","tags":["web"]},{"url":"https://pypi.org/project/bedrock-agentcore/1.18.1","tags":["web"]},{"url":"https://github.com/advisories/GHSA-j6g5-3hh3-pgw8","tags":["advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/16xxx/CVE-2026-16796.json","tags":["advisory"]},{"url":"https://github.com/aws/bedrock-agentcore-sdk-python","tags":["package"]},{"url":"https://pypi.org/project/bedrock-agentcore","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-16796","title":"Improper neutralization of argument delimiters in AWS Bedrock AgentCore Python SDK install_packages()","description":"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.\n\n\n\nTo mitigate this issue, users should upgrade to the patched version 1.18.1.","status":"published","published":"2026-07-23T20:06:32.908Z","modified":"2026-07-24T13:34:19.993Z","cvss":[{"version":"4.0","score":8.4,"vector":"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","level":"high","assessor":"cna"},{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N","level":"high","assessor":"cna"}],"cwes":["CWE-88"],"updated_at":"2026-11-02T14:20:11.24076Z"}],"euvd":[{"id":"EUVD-2026-48422","description":"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.\n\n\n\nTo mitigate this issue, users should upgrade to the patched version 1.18.1.","status":"published","published":"2026-07-23T20:06:32Z","modified":"2026-07-24T13:34:19Z","cvss":[{"version":"4.0","score":8.4,"vector":"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","level":"high"}],"updated_at":"2026-11-02T18:19:41.195396Z"}],"ghsa":[{"id":"GHSA-j6g5-3hh3-pgw8","title":"AWS Bedrock AgentCore: Improper neutralization of argument delimiters in the Python SDK install_packages()","description":"### Summary\n\nThe 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.\n\n### Impact\nInsufficient 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.\n\n### Impacted Versions\n\u003c 1.18.1\n\n### Patches\nThis 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.\n\n### Workarounds\nIf 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.\n\n### References\nIf you have any questions or comments about this advisory, AWS asks that you contact AWS Security via the [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### Acknowledgement\n\nAWS would like to thank Sergio Garcia (@MrCloudSec) for collaborating on this issue through the coordinated issue disclosure process.","status":"published","published":"2026-07-24T22:38:56Z","modified":"2026-07-24T22:38:57Z","cvss":[{"version":"4.0","score":8.4,"vector":"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","level":"high"},{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N","level":"high"}],"cwes":["CWE-88"],"updated_at":"2026-11-02T14:40:53.707378Z"}],"nvd":[{"id":"CVE-2026-16796","description":"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.\n\n\n\nTo mitigate this issue, users should upgrade to the patched version 1.18.1.","status":"published","published":"2026-07-23T21:17:03.51Z","modified":"2026-10-24T13:10:00.147Z","cvss":[{"version":"4.0","score":8.4,"vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"},{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N","level":"high","assessor":"secondary"}],"cwes":["CWE-88"],"updated_at":"2026-11-02T14:12:32.473901Z"}],"osv":[{"id":"CVE-2026-16796","title":"Improper neutralization of argument delimiters in AWS Bedrock AgentCore Python SDK install_packages()","description":"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.\n\n\n\nTo mitigate this issue, users should upgrade to the patched version 1.18.1.","status":"published","published":"2026-07-23T20:06:32.908Z","modified":"2026-10-28T02:30:58.854327322Z","cvss":[{"version":"4.0","score":8.4,"vector":"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","level":"high"}],"cwes":["CWE-88"],"updated_at":"2026-11-02T15:44:57.682091Z"},{"id":"GHSA-j6g5-3hh3-pgw8","title":"AWS Bedrock AgentCore: Improper neutralization of argument delimiters in the Python SDK install_packages()","description":"### Summary\n\nThe 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.\n\n### Impact\nInsufficient 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.\n\n### Impacted Versions\n\u003c 1.18.1\n\n### Patches\nThis 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.\n\n### Workarounds\nIf 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.\n\n### References\nIf you have any questions or comments about this advisory, AWS asks that you contact AWS Security via the [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### Acknowledgement\n\nAWS would like to thank Sergio Garcia (@MrCloudSec) for collaborating on this issue through the coordinated issue disclosure process.","status":"published","published":"2026-07-24T22:38:56Z","modified":"2026-08-04T14:41:02.354487741Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N","level":"high"},{"version":"4.0","score":8.4,"vector":"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","level":"high"}],"cwes":["CWE-88"],"updated_at":"2026-11-02T15:46:49.977351Z"},{"id":"PYSEC-2026-3551","title":"AWS Bedrock AgentCore: Improper neutralization of argument delimiters in the Python SDK install_packages()","description":"### Summary\n\nThe 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.\n\n### Impact\nInsufficient 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.\n\n### Impacted Versions\n\u003c 1.18.1\n\n### Patches\nThis 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.\n\n### Workarounds\nIf 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.\n\n### References\nIf you have any questions or comments about this advisory, AWS asks that you contact AWS Security via the [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### Acknowledgement\n\nAWS would like to thank Sergio Garcia (@MrCloudSec) for collaborating on this issue through the coordinated issue disclosure process.","status":"published","published":"2026-08-04T11:34:43.653094Z","modified":"2026-08-04T14:30:15.015116953Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N","level":"high"},{"version":"4.0","score":8.4,"vector":"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","level":"high"}],"updated_at":"2026-11-02T15:52:56.847083Z"}]}}