Vulnerability · Published Jul 23, 2026 · Assigned by AMZN

CVE-2026-16796Improper neutralization of argument delimiters in AWS Bedrock AgentCore Python SDK install_packages()

High 7.3

In plain English

A high-severity argument injection in bedrock-agentcore 1.18.1 from AWS. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 54% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.3High

Exploit odds (30 days)0.7%top 45.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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. To mitigate this issue, users should upgrade to the patched version 1.18.1.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
PyPI	bedrock-agentcore	1.18.1	GHSA-j6g5-3hh3-pgw8
PyPI	bedrock-agentcore	1.18.1	PYSEC-2026-3551

Affected products (as reported)

Vendor	Product	Versions
AWS	bedrock-agentcore 1.18.1	0 – before 1.18.1

Weakness: CWE-88 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N

References

https://pypi.org/project/bedrock-agentcore/1.18.1/ release-notes, patch
https://aws.amazon.com/security/security-bulletins/2026-065-aws/ vendor-advisory
https://github.com/aws/bedrock-agentcore-sdk-python/security/advisories/GHSA-j6g5-3hh3-pgw8 release-notes