CVE-2026-46341 Details
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 0.9.21, the fetch-apify-docs tool in src/tools/common/fetch_apify_docs.ts validates allowlisted documentation domains with String.startsWith() rather than URL hostname comparison, allowing attacker-controlled URLs such as `https://docs.apify.com.evil.com/` and `https://[email protected]/` to pass the ALLOWED_DOC_DOMAINS check and return arbitrary fetched content to the LLM. This issue is fixed in version 0.9.21.
A domain allowlist bypass vulnerability has been identified in the Apify MCP server's fetch-apify-docs tool, prior to version 0.9.21. The tool validates URLs against an allowlist using String.startsWith() for domain prefixes, rather than proper URL hostname comparisons. This flaw allows attacker-controlled URLs to bypass the check and return arbitrary content to the language model (LLM). For example, URLs like https://docs.apify.com.evil.com/ and https://[email protected]/ can be used to exploit this vulnerability. The fetched content could be injected into the LLM, potentially manipulating its responses.
Users should update to Apify MCP Server version 0.9.21 or later, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Jul 16, 2026CISA-ADP
Assessed Jul 17, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/apify/apify-mcp-server/security/advisories/GHSA-jwp7-wg77-3w9v | CISA-ADP | AdvisoryExploitRemedyVendor |
| https://github.com/apify/apify-mcp-server/commit/e39bdee530da1db0b3b3d3713558b33c9608e629 | [email protected] | Source CodeVendor |
| https://github.com/apify/apify-mcp-server/pull/781 | [email protected] | Issue TrackingVendor |
| https://github.com/apify/apify-mcp-server/releases/tag/v0.9.21 | [email protected] | Release NotesVendor |
| https://github.com/apify/apify-mcp-server/security/advisories/GHSA-jwp7-wg77-3w9v | [email protected] | AdvisoryExploitRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-183 | Permissive List of Allowed Inputs | [email protected] |
| CWE-20 | Improper Input Validation | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Apify MCP server | < 0.9.21 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 17, 2026 | CVE Modified | CISA-ADP |
| Jul 16, 2026 | New CVE Received | [email protected] |