CVE-2026-15737 - Sensitive content disclosure via OpenTelemetry spans in AgentCore Python SDK

Summary

CVE-2026-15737 is a sensitive content disclosure flaw in the OpenTelemetry instrumentation of the Bedrock AgentCore Python SDK (bedrock-agentcore). Affected versions 1.4.8 and 1.5.0 wrote raw user prompts and complete agent responses into span attributes on every invocation, without filtering or masking. A local authenticated user with CloudWatch Logs read access to the customer's aws/spans log group could read that content.

Mitigation

The source does not state a fix yet. Check the original advisory for updates.

Related items

• HighCVE-2026-115413 - AWS API MCP Server OAuth token audience validation bypassSame vendor · AWS Security Bulletins
• MediumCVE-2026-116635 - Improper limitation of a pathname to a restricted directory in the deployment status component of the AWS Serverless MCP ServerSame vendor · AWS Security Bulletins
• MediumCVE-2026-120497 - Stored cross-site scripting in the HTML report generator of aidlc-traceability in AWS AI-DLC WorkflowsSame vendor · AWS Security Bulletins
• HighCVE-2026-115415 - Secret masking bypass in the environment tool in Strands Agents ToolsSame vendor · AWS Security Bulletins
• HighGHSA-4v6f-7vjh-6x4m: Strands Agents SDK: Exposure of data element to wrong session in the A2A ServerSame vendor · GitHub Advisory Database