High severity7.5NVD Advisory· Published Mar 16, 2026· Updated May 11, 2026
CVE-2026-4269
CVE-2026-4269
Description
A missing S3 ownership verification in the Bedrock AgentCore Starter Toolkit before version v0.1.13 may allow a remote actor to inject code during the build process, leading to code execution in the AgentCore Runtime. This issue only affects users of the Bedrock AgentCore Starter Toolkit before version v0.1.13 who build or have built the Toolkit after September 24, 2025. Any users on a version >=v0.1.13, and any users on previous versions who built the toolkit before September 24, 2025 are not affected.
To remediate this issue, customers should upgrade to version v0.1.13.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
bedrock-agentcore-starter-toolkitPyPI | < 0.1.13 | 0.1.13 |
Affected products
2- cpe:2.3:a:amazon:bedrock_agentcore_starter_toolkit:*:*:*:*:*:python:*:*Range: <0.1.13
- AWS/Bedrock AgentCore Starter Toolkitv5Range: 0.1.0
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
6- aws.amazon.com/security/security-bulletins/2026-008-AWS/nvdVendor Advisory
- github.com/advisories/GHSA-xfhr-q72q-jcrjghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-4269ghsaADVISORY
- aws.amazon.com/security/security-bulletins/2026-008-AWSghsaWEB
- github.com/aws/bedrock-agentcore-starter-toolkit/releases/tag/v0.1.13nvdRelease NotesWEB
- github.com/aws/bedrock-agentcore-starter-toolkit/security/advisories/GHSA-xfhr-q72q-jcrjghsaWEB
News mentions
0No linked articles in our index yet.