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

> CVE-2026-89066: OS command injection in the task synthesis component in projen. CVSS 7.8 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-89066
Last updated: 2026-09-11T18:24:59Z

- Published: 2026-09-11 16:05 UTC · Updated: 2026-09-11 18:24 UTC · Assigner: AMZN
- CVSS: 7.8 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS: 0.23%, 14th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-78, CWE-88

## 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 vendors and products

- AWS: projen

## Tracked companies

- [Amazon Web Services](https://rewindex.com/company/aws.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-89066)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-89066)
- [https://aws.amazon.com/security/security-bulletins/2026-108-aws/](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/releases/tag/v0.103.0)
- [https://github.com/projen/projen/security/advisories/GHSA-q6g4-h6vc-vqm8](https://github.com/projen/projen/security/advisories/GHSA-q6g4-h6vc-vqm8)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-89066 · Markdown: https://rewindex.com/cve/CVE-2026-89066.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-89066 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:13:42.214Z