{"id":"GHSA-wcx4-wpfv-mc5c","revision":"8c5083f73d454e288a4fae231b29e0e4","records":[{"revision":"8c5083f73d454e288a4fae231b29e0e4","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-wcx4-wpfv-mc5c","aliases":["CVE-2026-15895"],"title":"jsii-diff: Command Injection via npm: package argument","description":"## Summary\n\njsii-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. An issue exists where specially formatted command line arguments can be used to execute shell commands via this tool.\n\n## Impact\njsii-diff supports downloading packages to compare directly from NPM, so that you can compare a proposed candidate version of your jsii package with an already-published version, by passing an argument that looks like `npm:<package-specifier>`. For example:\n\n```\njsii-diff npm:my-package@latest .\n```\n\nBy injecting a `;` into the `package-specifier` part of that command, jsii-diff can be tricked into running shell commands. For example:\n\n```\njsii-diff \"npm:lodash; touch /tmp/123\" .\n```\n\nThis allows anyone that can control the command-line arguments to jsii-diff to run arbitrary commands with the same permissions as the jsii-diff command itself.\n\n## Patches\nThis issue has been addressed in jsii-diff version 1.131.0. We recommend upgrading to the latest version and ensuring any forked or derivative code is patched to incorporate the new fixes.\n\n## Workarounds\nIf you are unable to update, make sure only trusted actors can control the arguments passed to jsii-diff.\n\n## References\nIf you have any questions or comments about this advisory, AWS asks that you contact AWS Security via the [vulnerability reporting page](https://aws.amazon.com/security/vulnerability-reporting) or directly via email to [aws-security@amazon.com](mailto:aws-security@amazon.com). Please do not create a public GitHub issue.","state":0,"publishedAt":"2026-08-07T18:15:47+00:00","modifiedAt":"2026-08-07T18:41:00.528075+00:00","affected":[{"ecosystem":"npm","name":"jsii-diff","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"1.131.0"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","score":null,"severity":null},{"system":"CVSS_V4","vector":"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","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"HIGH"}],"references":["https://github.com/aws/jsii/security/advisories/GHSA-wcx4-wpfv-mc5c","https://nvd.nist.gov/vuln/detail/CVE-2026-15895","https://aws.amazon.com/security/security-bulletins/2026-057-aws","https://github.com/aws/jsii","https://github.com/aws/jsii/releases/tag/v1.131.0"],"sourceUrl":"https://github.com/advisories/GHSA-wcx4-wpfv-mc5c","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-wcx4-wpfv-mc5c","identifiers":["GHSA-wcx4-wpfv-mc5c","CVE-2026-15895"]},"retained":false,"historicalAffected":[]}],"coverage":[]}