Relative Path Traversal Affecting projen package, versions <0.101.37
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-JS-PROJEN-19823700
- published15 Sept 2026
- disclosed11 Sept 2026
- creditEthanMiller
Introduced: 11 Sep 2026
NewCVE-2026-89065 (opens in a new tab)How to fix?
Upgrade projen to version 0.101.37 or higher.
Overview
projen is a CDK for software projects
Affected versions of this package are vulnerable to Relative Path Traversal in the manifest cleanup routine that processes .projen/files.json during synthesis, which resolves each manifest entry against the project directory with path.resolve() without verifying that the result remains inside that directory. An attacker can cause recursive deletion of arbitrary files and directories writable by the environment running projen, by placing an entry containing ../ sequences or an absolute path in .projen/files.json, which then reaches fs.rmSync() with recursion enabled. This requires the attacker to influence .projen/files.json through a direct commit or a pull request that triggers CI synthesis, and the deletion is bounded to paths writable by that process.