CVE-2026-89066

HighCVSS 7.8

Published: 11/09/2026(UTC)Updated: 11/09/2026(UTC)Translated: 11/09/2026(UTC)NVD NIST

Exploitation Probability (EPSS)

Low risk

0.16%

5th percentile - higher than 5% of all known CVEs

Summary

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.

Risk Assessment

An attacker could execute arbitrary commands in the developer or CI environment, potentially leading to workstation compromise, data theft, or software supply chain poisoning.

Recommendation

Upgrade projen to version 0.103.0 and then re-synthesize the project to regenerate .projen/tasks.json with the corrected task definitions.

Other vulnerabilities in projen

CVE-2026-89065High
Relative path traversal in the generated file manifest cleanup component in projen before 0.101.37 might allow context-dependent attackers to recursively delete files and directories outside the project directory that are writable by the environment running projen, via crafted entries in the version-controlled generated file manifest that is consumed during project synthesis. To remediate this issue, users should upgrade to version 0.101.37. The corrected containment check is automatically applied by the projen runtime next time you run it.

Original NVD description (English source)

Vulnerability data from NVD (NIST) · CISA KEV · EPSS