{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata. Fed continuously.","feed_url":"https://feed.craftedsignal.io/products/jsii-diff--1.131.0/feed.json","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cpes":[],"_cs_cves":[{"cvss":7.8,"id":"CVE-2026-15895"}],"_cs_exploited":false,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":["jsii-diff (\u003c 1.131.0)"],"_cs_severities":["high"],"_cs_tags":[],"_cs_type":"advisory","_cs_vendors":["Amazon"],"content_html":"\u003cp\u003eThe jsii-diff utility, an API compatibility comparison tool used within development pipelines, contains a command injection vulnerability tracked as CVE-2026-15895. The flaw exists in the tool's handling of command-line arguments that begin with the \u0026quot;npm:\u0026quot; prefix, which triggers an automated package retrieval process.\u003c/p\u003e\n\u003cp\u003eThe application improperly sanitizes the package specifier argument, allowing an attacker to inject shell metacharacters such as semicolons directly into the command string passed to the underlying system shell. This vulnerability allows an attacker to execute arbitrary commands with the same security context and permissions as the user or service account executing jsii-diff. Because this tool is commonly integrated into automated CI/CD pipelines, this vulnerability poses a significant risk to the integrity of build environments. This issue was addressed in version 1.131.0, and defenders are urged to audit pipeline configurations to ensure that input passed to this tool cannot be manipulated by untrusted sources.\u003c/p\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation allows local command execution, potentially leading to unauthorized data exfiltration, modification of pipeline artifacts, or persistence within the development environment. The risk is highest in CI/CD environments where user-supplied inputs may be passed to the jsii-diff utility without sufficient validation or containment.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eUpgrade the jsii-diff package to version 1.131.0 or higher across all development, build, and CI/CD environments.\u003c/li\u003e\n\u003cli\u003eAudit all CI/CD pipelines and automation scripts to identify instances where user-supplied data is concatenated into command-line arguments for jsii-diff.\u003c/li\u003e\n\u003cli\u003eIf upgrading is not immediately possible, implement strict input validation to ensure that any argument beginning with \u0026quot;npm:\u0026quot; adheres to expected alphanumeric formats and contains no shell metacharacters such as ';', '|', '\u0026amp;', or '$'.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-08-07T21:31:08Z","date_published":"2026-08-07T21:31:08Z","id":"https://feed.craftedsignal.io/briefs/2026-08-jsii-diff-command-injection/","summary":"The jsii-diff tool fails to sanitize inputs provided with an 'npm:' prefix, allowing unauthenticated attackers to execute arbitrary shell commands via crafted package specifiers.","title":"Command Injection in jsii-diff via NPM Package Specifiers","url":"https://feed.craftedsignal.io/briefs/2026-08-jsii-diff-command-injection/"}],"language":"en","title":"CraftedSignal Threat Feed - Jsii-Diff (\u003c 1.131.0)","version":"https://jsonfeed.org/version/1.1"}