CVE-2026-16796 Improper neutralization of argument delimiters in AWS Bedrock AgentCore Python SDK install_packages()
Remote authenticated users can execute arbitrary commands in the Code Interpreter sandbox via crafted package names in the AWS Bedrock AgentCore Python SDK.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-16796?
CVE-2026-16796 is a high-severity command injection vulnerability in AWS bedrock-agentcore 1.18.1, published on 23 Jul 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
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.
Weakness: CWE-88
Which versions are affected by CVE-2026-16796?
3 open source packages ship an affected version, including bedrock-agentcore.
| Package | Affected | Fixed in |
|---|---|---|
bedrock-agentcore PyPI | All versions | 1.18.1 |
bedrock-agentcore PyPI | All versions | 1.18.1 |
bedrock-agentcore PyPI | All versions | 1.18.1 |
How do I fix CVE-2026-16796?
Upgrade bedrock-agentcore to 1.18.1 or later.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-16796 being exploited?
There is no known exploitation of CVE-2026-16796 in the wild and no public exploit code.
Sources
Also known as GHSA-j6g5-3hh3-pgw8, PYSEC-2026-3551.