Generation of Predictable Numbers or Identifiers Affecting bedrock-agentcore-starter-toolkit package, versions [,0.1.13)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PYTHON-BEDROCKAGENTCORESTARTERTOOLKIT-15747226
- published22 Mar 2026
- disclosed17 Mar 2026
- creditUnknown
Introduced: 17 Mar 2026
CVE-2026-4269 (opens in a new tab)How to fix?
Upgrade bedrock-agentcore-starter-toolkit to version 0.1.13 or higher.
Overview
bedrock-agentcore-starter-toolkit is an A starter toolkit for using Bedrock AgentCore
Affected versions of this package are vulnerable to Generation of Predictable Numbers or Identifiers in the S3 bucket ownership verification. An attacker can achieve code execution in the runtime environment by injecting malicious code during the build phase.
Note: This is only exploitable if the toolkit is built after September 24, 2025.