Amazon blueprints up to 0.3.155 Blueprint Resynthesis Framework owner os command injection

Summaryinfo

A vulnerability was found in Amazon blueprints up to 0.3.155. It has been declared as critical. Affected by this vulnerability is an unknown functionality of the component Blueprint Resynthesis Framework. Executing a manipulation of the argument owner can lead to os command injection. This vulnerability is registered as CVE-2026-85012. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability classified as critical was found in Amazon blueprints up to 0.3.155. This vulnerability affects some unknown processing of the component Blueprint Resynthesis Framework. The manipulation of the argument owner with an unknown input leads to a os command injection vulnerability. The CWE definition for the vulnerability is CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Improper neutralization of special elements used in an OS command (CWE-78) in the blueprint resynthesis framework in Amazon Web Services codecatalyst-blueprints before 0.3.156 might allow a user with permission to commit to a repository in the project to execute arbitrary commands in the blueprint resynthesis environment via shell metacharacters in the owner field of a [local] merge strategy entry in a crafted .ownership-file. Version 0.3.156 removes shell interpretation of the owner field, running the command directly rather than through a shell, and rejects values outside an allowlisted command form. This eliminates shell metacharacter command injection. To remediate this issue, users should upgrade to version 0.3.156 or later. No action is required for use of the Amazon CodeCatalyst service. Resynthesis runs in an isolated per-project environment with scoped credentials, and the service applies server-side validation there that rejects [local] merge strategy commands outside a restricted allowlisted form, including for blueprint versions published before 0.3.156.

The advisory is available at npmjs.com. This vulnerability was named CVE-2026-85012 since 09/02/2026. The exploitation appears to be easy. The attack can be initiated remotely. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1202 by the MITRE ATT&CK project.

Upgrading to version 0.3.156 eliminates this vulnerability.

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Productinfo

Vendor

• Amazon

Name

• blueprints

Version

• 0.3.155

License

• commercial

CPE 2.3info

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CPE 2.2info

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