Threats affecting pkg:npm/projen

Two vulnerabilities were found in the open-source tool projen affecting versions before 0.101.37 and 0.103.0. CVE-2026-89065 is a relative path traversal vulnerability that may allow deletion of files outside the project directory. CVE-2026-89066 is an OS command injection vulnerability that could enable arbitrary command execution on developer workstations or CI runners. Fixes are available in versions 0.101.37 and 0.103.0 respectively. Users should upgrade and re-synthesize projects for CVE-2026-89066 to ensure safe task definitions.

Improper neutralization of special elements used in an OS command in the task synthesis component in projen before 0.103.0 might allow context-dependent attackers to execute arbitrary commands on a developer workstation or continuous integration runner via shell metacharacters in project configuration values and repository file names that are interpolated into generated task definitions. To remediate this issue, users should upgrade to version 0.103.0 and then re-synthesize the project so that .projen/tasks.json is regenerated with the corrected task definitions. Upgrading alone is not sufficient because the generated task definition file is committed to the repository.