CVE-2026-18830 - Issue with Amazon Bedrock AgentCore harness โ Insufficient Input Validation
Amazon Bedrock ยท 2026-10-21
Actions
Technical Details
| Affected Versions | prior to July 31, 2026 |
|---|---|
| Regions | all |
| CVE IDs | CVE-2026-18830 |
| Cost Impact | Neutral |
What This Means
For DevOps Teams
Update the Amazon Bedrock AgentCore harness InvokeHarness API to the latest version to incorporate the server-side input validation that rejects caller-supplied tool-use content blocks, ensuring security and compliance.
For Platform Teams
Deploy the updated Amazon Bedrock AgentCore harness with enhanced input validation to strengthen the security posture and protect against potential vulnerabilities.
For Executives
Implement the security patch for Amazon Bedrock AgentCore harness to mitigate the risk of bypassing model invocation and associated security controls, ensuring robust input validation and protecting against potential threats.
Source
Related Amazon Bedrock Updates
- AgentCore Gateway now supports Bedrock InvokeModel APIs and model fallback (2026-10-22)
- Amazon Bedrock Guardrails now supports Standard tier for contextual grounding checks (2026-10-20)
- Structured outputs for Claude models available on Amazon Bedrock (2026-10-20)
- Amazon Bedrock Advanced Prompt Optimization now supports prompt shortening (2026-10-20)
- Grok 4.7 is now available on Amazon Bedrock in AWS GovCloud (US) (2026-10-19)