Description
Improper neutralization of triple-quote characters during Python code generation in AgentCore CLI before v0.14.2 might allow an authenticated remote threat actor to execute arbitrary code on AWS AgentCore Runtime under the imported agent's IAM execution role and on the local environment of another user in the same AWS account, via a crafted collaborationInstruction stored on a Bedrock Agent collaborator and later processed by that other user during agent import. To remediate this issue, users should upgrade to version 0.14.2.
CVSS breakdown
CVSS 4.0
Attack Vector
Network
Attack Complexity
Low
Attack Requirements
Present
Privileges Required
Low
User Interaction
Active
Confidentiality (Vulnerable System)
High
Integrity (Vulnerable System)
High
Availability (Vulnerable System)
High
Confidentiality (Subsequent System)
High
Integrity (Subsequent System)
High
Availability (Subsequent System)
High
CVSS 3.1
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High
Affected products
- AWS / AgentCore CLI0.4.0 – 0.14.1
- AWS / AgentCore CLI0.3.0-preview.7.0 – 1.0.0-preview.8
References
- PATCHhttps://github.com/aws/agentcore-cli/releases/tag/v0.14.2
- MISChttps://www.npmjs.com/package/@aws/agentcore/v/0.14.2
- MISChttps://www.npmjs.com/package/@aws/agentcore/v/1.0.0-preview.9
- MISChttps://aws.amazon.com/security/security-bulletins/2026-040-aws/
- VENDOR_ADVISORYhttps://github.com/aws/agentcore-cli/security/advisories/GHSA-m4x6-gwgp-4pm7