CVE-2026-89066

OS command injection in the task synthesis component in projen

State: Published
Severity: 8.4 High
Published: Sep 11, 2026
Updated: Sep 11, 2026
Reserved: Sep 10, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	8.4 High	CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N	AMZN
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H	AMZN

Weaknesses

CWE-78 Improper neutralization of special elements used in an OS command ('OS command injection')
CWE-88 Improper neutralization of argument delimiters in a command ('argument injection')

Affected Products

Product	Versions
projenAWS	before 0.103.0Affected

References

https://github.com/projen/projen/releases/tag/v0.103.0patch
https://aws.amazon.com/security/security-bulletins/2026-108-aws/vendor-advisory
https://github.com/projen/projen/security/advisories/GHSA-q6g4-h6vc-vqm8third-party-advisory

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.