{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-59176","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-07-02T19:53:48.829Z","datePublished":"2026-10-28T13:08:52.592Z","dateUpdated":"2026-10-28T13:08:52.592Z"},"containers":{"cna":{"title":"Functype: MCP set_functype_version Package Alias RCE via Unsanitized pnpm install + Dynamic Import","problemTypes":[{"descriptions":[{"cweId":"CWE-829","lang":"en","description":"CWE-829: Inclusion of Functionality from Untrusted Control Sphere","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":7.8,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","version":"3.1"}}],"references":[{"name":"https://github.com/jordanburke/functype/security/advisories/GHSA-wcjj-9m6g-2fr2","tags":["x_refsource_CONFIRM"],"url":"https://github.com/jordanburke/functype/security/advisories/GHSA-wcjj-9m6g-2fr2"},{"name":"https://github.com/jordanburke/functype/commit/c0d58ad9c2a7d15c6117bd3adbbd75de37317dcf","tags":["x_refsource_MISC"],"url":"https://github.com/jordanburke/functype/commit/c0d58ad9c2a7d15c6117bd3adbbd75de37317dcf"},{"name":"https://github.com/jordanburke/functype/releases/tag/v1.4.4","tags":["x_refsource_MISC"],"url":"https://github.com/jordanburke/functype/releases/tag/v1.4.4"}],"affected":[{"vendor":"jordanburke","product":"functype","versions":[{"version":"< 1.4.4","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-10-28T13:08:52.592Z"},"descriptions":[{"lang":"en","value":"Functype is a family of TypeScript functional programming libraries. Prior to 1.4.4, the `set_functype_version` MCP tool in `functype-mcp-server` accepts an unconstrained `version` string using only `z.string()` validation in `packages/mcp-server/src/index.ts` and interpolates it into `functype@<version>` for `pnpm add`. Package-alias syntaxes such as `file:`, `npm:`, URLs, or paths can cause an arbitrary local or remote package to be installed as functype. Immediately afterward, `initDocsData(true)` in `packages/mcp-server/src/lib/docs/data.ts` resolves `functype/cli` and dynamically imports the newly installed module, executing attacker-controlled JavaScript with the MCP server process's privileges. Any MCP client able to send a `tools/call` request invoking the tool can exploit the flaw; the tool is enabled by default without authentication in `stdio` mode. A connected AI assistant susceptible to indirect prompt injection can also be induced to invoke it from a malicious document or web page. In non-default `TRANSPORT_TYPE=httpStream` deployments, a network-accessible attacker does not require local access. Successful execution can read process secrets, modify files, or terminate the server. This issue is fixed in `version` 1.4.4."}],"source":{"advisory":"GHSA-wcjj-9m6g-2fr2","discovery":"UNKNOWN"}}}}