CVE-2026-15737: Sensitive content disclosure via OpenTelemetry spans in AgentCore Python SDK
AWS Bedrock AgentCore Python SDK is an open-source Python library that provides client tools for building AI agents on the Amazon Bedrock AgentCore platform.
Unintended logging of sensitive user content in the OpenTelemetry instrumentation in AWS Bedrock AgentCore Python SDK versions 1.4.8 and 1.5.0 might allow a local authenticated user with access to CloudWatch Logs to access raw user prompts and agent responses containing sensitive data via span attributes. The SDK wrote raw user prompts and complete agent responses into OpenTelemetry span attributes on every invocation without filtering or masking. These spans flow into the customer's aws/spans CloudWatch log group, exposing sensitive content to any principal with log read access.
We recommend you upgrade to version 1.5.1 or later. Users who ran affected versions should also review and purge sensitive content from their aws/spans CloudWatch log groups.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
AWS Bedrock AgentCore Python SDKto a version that resolves this vulnerability.Fixed in 1.5.1 - Operational
For users who ran AWS Bedrock AgentCore Python SDK v1.4.8 or v1.5.0, review the aws/spans CloudWatch log group and purge any sensitive content exposed in OpenTelemetry span attributes (raw user prompts and complete agent responses).
Event History
Frequently Asked Questions
What is the severity of CVE-2026-15737?
The severity of CVE-2026-15737 is rated as medium with a score of 5.7.
What type of vulnerability is CVE-2026-15737?
CVE-2026-15737 is a sensitive content disclosure vulnerability via unintended logging in the OpenTelemetry instrumentation.
Which versions of the AWS Bedrock AgentCore Python SDK are affected by CVE-2026-15737?
CVE-2026-15737 affects AWS Bedrock AgentCore Python SDK versions 1.4.8 and 1.5.0.
How do I fix CVE-2026-15737?
To mitigate CVE-2026-15737, upgrade to AWS Bedrock AgentCore Python SDK version 1.5.1 or later.
What impact does CVE-2026-15737 have on sensitive data?
CVE-2026-15737 can lead to unintended logging of sensitive user content, potentially exposing it to unauthorized access.