What’s Vulnerable › Vulnerabilities

CVE-2026-89066: OS command injection in the task synthesis component in projen

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-11 · updated 2026-09-11
• Weakness: CWE-78

Description

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 products

• AWS projen: before 0.103.0 — fixed in 0.103.0

How to fix

Upgrade to a fixed version: AWS projen 0.103.0. Check the vendor advisory for mitigations.

References

• https://aws.amazon.com/security/security-bulletins/2026-108-aws/
• https://github.com/projen/projen/releases/tag/v0.103.0
• https://github.com/projen/projen/security/advisories/GHSA-q6g4-h6vc-vqm8

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