CVE-2026-15737Network attack vector

Sensitive content disclosure via unmasked span attributes

Published Jul 16, 2026 · Updated Jul 16, 2026

Sensitive data exposure in Amazon Bedrock AgentCore Python SDK 1.4.8 and 1.5.0 allows local users to read agent content. On every invocation, its OpenTelemetry instrumentation writes raw user prompts and complete agent responses to span attributes without filtering or masking. Access requires an authenticated AWS principal with CloudWatch Logs read permission, and disclosure is limited to content exported to the customer's aws/spans log group.

CVSS severity5.7
Medium
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Sensitive data exposure in Amazon Bedrock AgentCore Python SDK 1.4.8 and 1.5.0 allows local users to read agent content. On every invocation, its OpenTelemetry instrumentation writes raw user prompts and complete agent responses to span attributes without filtering or masking. Access requires an authenticated AWS principal with CloudWatch Logs read permission, and disclosure is limited to content exported to the customer's aws/spans log group.

The record

CVE
CVE-2026-15737
Published
Jul 16, 2026
Updated
Jul 16, 2026
Vendor
Amazon Web Services
Product
Amazon Bedrock AgentCore Python SDK
Classifications
T1213
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 16, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.4.8
  2. Affected versionversion=1.5.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Amazon Web Services · Amazon Bedrock AgentCore Python SDKversion=1.4.8; version=1.5.0

Published CVSS scores

5.7GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1213Data from Information Repositories

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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