What’s Vulnerable › Vulnerabilities

CVE-2026-50143: Actor MCP path authority injection leaks Apify token

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-18 · updated 2026-10-22
• Weakness: CWE-918

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.

Affected products

• apify-mcp-server: before 0.10.11

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

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