CVE-2026-89066
Published:September 11, 2026
Updated:September 22, 2026
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.
Affected Packages
https://github.com/projen/projen.git (GITHUB):
Affected version(s) >=v0.0.0 <v0.103.0Fix Suggestion:
Update to version v0.103.0github.com/projen/projen-go/projen (GO):
Affected version(s) >=v0.0.0 <v0.103.0Fix Suggestion:
Update to version v0.103.0io.github.cdklabs:projen (JAVA):
Affected version(s) >=0.0.0 <0.103.0Fix Suggestion:
Update to version 0.103.0projen (NPM):
Affected version(s) >=0.1.0 <0.103.0Fix Suggestion:
Update to version 0.103.0projen (PYTHON):
Affected version(s) >=0.14.0 <0.103.0Fix Suggestion:
Update to version 0.103.0Related Resources (3)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.4
Attack Vector
LOCAL
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
ACTIVE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.8
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
EPSS
Base Score:
0.16