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jsii-diff

Bulletin ID: 2026-057-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 07/15/2026 12:00 PM PDT Description: jsii-diff is a command line tool to compare the API differences between two jsii assemblies, and report errors if there are backwards-incompatible changes to the API. We identified CVE-2026-15895, an issue where specially formatted command line arguments can be used to execute shell commands via this tool. Impacted versions: < 1.131.0 Please refer to the article below for the most up-to-date and complete information related to this AWS Security Bulletin.

The jsii-diff command line tool, used to compare API differences between jsii assemblies, improperly neutralizes special shell characters in command line arguments. Specifically, when a package specifier argument includes shell metacharacters such as a semicolon (';'), it can lead to execution of arbitrary shell commands with the permissions of the jsii-diff process. This vulnerability is identified as CWE-78 (OS command injection). The flaw affects versions prior to 1.131.0, and was addressed by AWS in version 1.131.0. The tool supports downloading packages directly from NPM, which is the vector for injection via the package specifier argument.

Detailed information about CVE-2026-15895: CWE-78 Improper neutralization of special elements used in an OS command ('OS command injection') in AWS jsii affecti

CVE-2026-15895: CWE-78 Improper neutralization of special elements used in an OS command ('OS command injection') in AWS jsii - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2026-15895: CWE-78 Improper neutralization of special elements used in an OS command ('OS command injection') in AWS jsii

A command injection vulnerability exists in the npm package loading component of AWS jsii-diff before version 1.131.0. This flaw allows context-dependent attackers to execute arbitrary OS commands by supplying crafted package specifiers to the npm: source argument. The vulnerability is addressed in jsii-diff version 1.131.0 and later.

The vulnerability is an OS command injection (CWE-78) in the npm package loading component of AWS jsii-diff prior to version 1.131.0. Attackers can exploit this by passing specially crafted package specifiers to the npm: source argument, potentially leading to arbitrary command execution. This issue has a CVSS 3.1 score of 7.8, indicating high severity with impacts on confidentiality, integrity, and availability. The vulnerability is fixed in version 1.131.0.

Detailed information about Duplicate Advisory: Command Injection in jsii-diff via npm: package argument affecting null jsii-diff. Get real-time updates, technic

Duplicate Advisory: Command Injection in jsii-diff via npm: package argument - Live Threat Intelligence - Threat Radar | OffSeq.com

Duplicate Advisory: Command Injection in jsii-diff via npm: package argument


CVE-2026-15895: CWE-78 Improper neutralization of special elements used in an OS command ('OS command injection') in AWS jsiiCVE-2026-15895 0 Bulletin ID: 2026-057-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 07/15/2026 12:00 PM PDT Description: jsii-diff is a command line tool to compare the API differences between two jsii assemblies, and report errors if there are backwards-incompatible changes to the API. We identified CVE-2026-15895, an issue where specially formatted command line arguments can be used to execute shell commands via this tool. Impacted versions: < 1.131.0 Please refer to the article below for the most up-to-date and complete information related to this AWS Security Bulletin. HighVulnerability#cve #cve-2026-15895 #cwe-78 Join the discussion	CVE Database V5	10/14/2026, 18:38:44 UTC Added: 07/15/2026, 19:18:11 UTC
Duplicate Advisory: Command Injection in jsii-diff via npm: package argument 0 A command injection vulnerability exists in the npm package loading component of AWS jsii-diff before version 1.131.0. This flaw allows context-dependent attackers to execute arbitrary OS commands by supplying crafted package specifiers to the npm: source argument. The vulnerability is addressed in jsii-diff version 1.131.0 and later. HighVulnerability#gcve #osv #ghsa-h738-vh6g-q8gh Join the discussion	GCVE Database	07/15/2026, 21:31:22 UTC Added: 08/08/2026, 14:54:30 UTC

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