Actor MCP path authority injection leaks Apify token
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| apify | apify-mcp-server | before 0.10.11 | 0.10.11 | Patch available | CNA |
| — | @apify/actors-mcp-server (npm) | before 0.10.11 | 0.10.11 | Patch available | GHSA-6gr2-qh89-hxwm |
- apify-mcp-server Vendorapify Affected before 0.10.11 Fixed in 0.10.11 Patch available CNA
- @apify/actors-mcp-server (npm) Vendor— Affected before 0.10.11 Fixed in 0.10.11 Patch available GHSA-6gr2-qh89-hxwm
Remediation
- Fix · CNA apify-mcp-server (apify) Fixed in 0.10.11
- Fix · GHSA-6gr2-qh89-hxwm @apify/actors-mcp-server (npm) Fixed in 0.10.11 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-50143
- 2026-10-03 Alias added: GHSA-6gr2-qh89-hxwm
References
Other 5
- https://github.com/apify/apify-mcp-server/security/advisories/GHSA-6gr2-qh89-hxwm
- https://github.com/apify/apify-mcp-server/pull/927
- https://github.com/apify/apify-mcp-server/commit/ef686d77da3d3c86c30b2ae24218d756aa38e09c
- https://github.com/apify/apify-mcp-server/releases/tag/v0.10.11
- https://github.com/apify/apify-mcp-server
More apify vulnerabilities
- TI-2026-34061 Apify MCP server: Domain Allowlist Bypass in fetch-apify-docs via String Prefix Matching CVSS 3.1MEDIUM 6.1
- TI-2026-56055 Apify Actors MCP Server before 0.9.12 Server-Side Request Forgery via get-html-skeleton CVSS 4.0HIGH 8.7
- TI-2026-34195 SSRF via sitemap-derived URLs in Crawlee for Python CVSS 4.0LOW 2.3
Sources
- CVE-2026-50143 · CVE Program
- CVE-2026-50143 · NVD
- FIRST EPSS
- GHSA-6gr2-qh89-hxwm · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences