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

Quick assessment

Affected
AWS projen
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

projen是projen组织开源的一个项目生成工具。 projen 0.103.0之前版本存在命令注入漏洞，该漏洞源于任务合成组件对OS命令中特殊元素中和不当，攻击者可通过项目配置值和仓库文件名中的shell元字符执行任意命令。

CVSS 7.8 · High EPSS 0.23% · P13

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 1

VendorProduct Version RangeStatus
AWS projen < 0.103.0 affected
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I. Basic Information for CVE-2026-89066

Vulnerability Information
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Vulnerability Title
OS command injection in the task synthesis component in projen
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
projen 命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
projen是projen组织开源的一个项目生成工具。 projen 0.103.0之前版本存在命令注入漏洞，该漏洞源于任务合成组件对OS命令中特殊元素中和不当，攻击者可通过项目配置值和仓库文件名中的shell元字符执行任意命令。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
AWS projen 0 ~ 0.103.0 -

II. Public POCs for CVE-2026-89066

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III. Intelligence Information for CVE-2026-89066

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Vendor Advisories for CVE-2026-89066 (2)

Vendor Pages for CVE-2026-89066 (1)

Same Patch Batch · AWS · 2026-09-11 · 5 CVEs total

CVE-2026-89065 7.1 HIGH Relative path traversal in the generated file manifest cleanup component in projen
CVE-2026-18061 5.9 MEDIUM Improper Restriction of XML External Entity References in AWS Advanced JDBC Wrapper Remote
CVE-2026-89090 5.9 MEDIUM Denial of service in the event stream header decoder in AWS SDK for Go v2
CVE-2026-89332 5.5 MEDIUM Kiro IDE Sensitive Workspace Data Exfiltration via Agent-Written Workspace Configuration

IV. Related Vulnerabilities

Same product: projen
Same vendor: AWS
Same weakness: CWE-78

V. Comments for CVE-2026-89066

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