CVE-2026-15737 Sensitive content disclosure via OpenTelemetry spans in AgentCore Python SDK
Local authenticated users with CloudWatch access can read sensitive prompts and responses logged in OpenTelemetry spans by the AWS Bedrock AgentCore Python SDK.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-15737?
CVE-2026-15737 is a medium-severity vulnerability in AWS bedrock-agentcore, published on 16 Jul 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
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.
Weakness: CWE-532
Which versions are affected by CVE-2026-15737?
How do I fix CVE-2026-15737?
No fix has been published for CVE-2026-15737 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-15737 being exploited?
There is no known exploitation of CVE-2026-15737 in the wild and no public exploit code.
Sources
Also known as GHSA-hqf8-7w95-9r33.