CVE-2026-85012 OS command injection in the Amazon CodeCatalyst blueprints SDK
An attacker with repository commit permissions can execute arbitrary commands in the blueprint resynthesis environment via shell metacharacters in a crafted ownership file.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-85012?
CVE-2026-85012 is a high-severity command injection vulnerability in AWS @amazon-codecatalyst/blueprints.blueprint, published on 3 Sep 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
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.
Weakness: CWE-78
Which versions are affected by CVE-2026-85012?
How do I fix CVE-2026-85012?
No fix has been published for CVE-2026-85012 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-85012 being exploited?
There is no known exploitation of CVE-2026-85012 in the wild and no public exploit code.