Search threats, CVEs… ⌘K
Back to vendor advisories
AWS Security BulletinsCVE-2026-11393

CVE-2026-11393 - Code Injection via Improper Triple-Quote Escaping in AgentCore CLI Bedrock Agent Import

Bulletin ID: 2026-040-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 06/08/2026 11:45 AM PDT Description: The AWS AgentCore CLI (@aws/agentcore) is a developer tool for managing agent infrastructure lifecycle on Amazon Bedrock AgentCore. We identified CVE-2026-11393 in which improper neutralization of triple-quote characters during Python code generation may allow an authenticated user in the same AWS account to inject arbitrary Python code into the source file generated by the "agentcore add agent ‐‐type import" command. Specifically, the collaborationInstruction field of a Bedrock Agent collaborator association was interpolated into a triple-quoted Python docstring using single-quote escaping rather than triple-quote escaping. A user with bedrock:AssociateAgentCollaborator IAM permission could craft a collaborationInstruction value containing """ to break out of the docstring boundary in the generated main.py of the imported agent. If that generated file was subsequently executed - either via agentcore dev on the developer's local machine, or via agentcore deploy followed by agentcore invoke in the AgentCore Runtime environment - the injected Python would run with the credentials available in that context. Impacted versions: - @aws/agentcore >= 0.4.0 AND = 0.3.0-preview.7.0 and

Read the vendor bulletin
Not listedCVSS not listedNot listed severity
Scope

What the vendor says is affected

The collected bulletin did not provide a separate affected-products list. Check the original bulletin before making an exposure decision.

Update history

What changed in later vendor updates

SecurityAlert records field-level changes from the point we begin following a bulletin. Earlier vendor changes may not have a field-by-field record.

    • The vendor changed the advisory's last-updated date.
Timeline

When this advisory changed

  1. Added to SecurityAlert

    We collected the advisory from the official source.

  2. Published by AWS

    The publication date reported by the vendor.

  3. Confirmed at the source

    Our collector saw this advisory during a later source check.

Vulnerabilities

CVEs named in this advisory

CVE-2026-11393View CVSS, KEV, EPSS, and threat context
Keep investigating
See every advisory from this vendor