CVE-2026-16796 - Improper neutralization of argument delimiters in AWS Bedrock AgentCore Python SDK install_packages()
Bulletin ID: 2026-065-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 07/23/2026 13:00 PM PDT Description: The 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. We identified CVE-2026-16796, an improper neutralization of argument delimiters in the install_packages() method that might allow a remote authenticated user to execute arbitrary commands within the Code Interpreter sandbox via crafted package name arguments. Impacted versions: bedrock-agentcore version <1.18.1 Please refer to the article below for the most up-to-date and complete information related to this AWS Security Bulletin.
CSIRTS triage
- What
- The vulnerability allows a remote authenticated user to execute arbitrary commands within the Code Interpreter sandbox via crafted package name arguments.
- Who is affected
- Remote authenticated users of the Bedrock AgentCore Python SDK version less than 1.18.1 are affected.
- Urgency
- Remediation is important as it allows for remote code execution, which can lead to severe security breaches.
- Action
- Upgrade to version 1.18.1 or later to mitigate the vulnerability.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://aws.amazon.com/security/security-bulletins/rss/2026-065-aws/
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-167960.33% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 25% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-16796 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
Recent advisories for - Improper neutralization
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
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