{"cve":"CVE-2026-50143","nvd":{"published":"2026-08-18T18:17:53.227","modified":"2026-10-22T22:10:00.250","status":"Deferred","description":"The Apify MCP server enables AI agents to extract data from websites using ready-made scrapers, crawlers, and automation tools available on the Apify Store. Prior to 0.10.11, getActorMCPServerURL in src/mcp/actors.ts concatenates the trusted Actor standby URL with the attacker-controlled webServerMcpPath from an Actor definition without verifying the resulting origin, allowing a malicious Actor publisher to use a userinfo-style authority value to redirect connectMCPClient to a third-party host. The call-actor, fetch-actor-details, and actor-mcp tool-loading paths pass this URL to transports in src/mcp/client.ts that attach the victim Authorization bearer token, exposing the Apify API token and enabling access to Actors, stored data, and billable compute. A victim must invoke or inspect the attacker-controlled Actor. This issue is fixed in version 0.10.11.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N","score":8.1},"cwes":["CWE-918"],"references":["https://github.com/apify/apify-mcp-server/commit/ef686d77da3d3c86c30b2ae24218d756aa38e09c","https://github.com/apify/apify-mcp-server/pull/927","https://github.com/apify/apify-mcp-server/releases/tag/v0.10.11","https://github.com/apify/apify-mcp-server/security/advisories/GHSA-6gr2-qh89-hxwm","https://github.com/apify/apify-mcp-server/security/advisories/GHSA-6gr2-qh89-hxwm"],"products":[],"source":"nvd","synced_at":"2026-10-23T16:39:26.291718493+00:00"},"epss":{"cve":"CVE-2026-50143","score":0.00488,"percentile":0.41753,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-6gr2-qh89-hxwm","url":"https://osv.dev/vulnerability/GHSA-6gr2-qh89-hxwm","summary":"Apify Model Context Protocol (MCP) server: Actor MCP path authority injection leaks Apify token","modified":"2026-09-10T03:51:10.785604703Z","packages":[{"ecosystem":"npm","name":"@apify/actors-mcp-server","purl":"pkg:npm/%40apify/actors-mcp-server","ranges":["<0.10.11"],"fixed":["0.10.11"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}