CVE-2026-4269

Published: Mar 16, 2026 Last Modified: Mar 16, 2026
ExploitDB:
Other exploit source:
Google Dorks:
MEDIUM 5,8
Source: ff89ba41-3aa1-4d27-914a-91399e9639e5
Attack Vector: network
Attack Complexity: high
Privileges Required: none
User Interaction: passive
Confidentiality: N/A
Integrity: N/A
Availability: N/A
HIGH 7,5
Source: ff89ba41-3aa1-4d27-914a-91399e9639e5
Attack Vector: network
Attack Complexity: high
Privileges Required: none
User Interaction: required
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: high

Description

AI Translation Available

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.

283

Unverified Ownership

Draft
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Access Control
Potential Impacts:
Gain Privileges Or Assume Identity
Applicable Platforms
All platforms may be affected
View CWE Details
340

Generation of Predictable Numbers or Identifiers

Incomplete
Abstraction: Class Structure: Simple
Common Consequences
Security Scopes Affected:
Other
Potential Impacts:
Varies By Context
Applicable Platforms
All platforms may be affected
View CWE Details
https://aws.amazon.com/security/security-bulletins/2026-008…
https://aws.amazon.com/security/security-bulletins/2026-008-AWS/
https://github.com/aws/bedrock-agentcore-starter-toolkit/re…
https://github.com/aws/bedrock-agentcore-starter-toolkit/releases/tag/v0.1.13