What’s Vulnerable › Vulnerabilities

CVE-2026-46341: Apify MCP server: Domain Allowlist Bypass in fetch-apify-docs via String Prefix Matching

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-16 · updated 2026-10-24
• Weakness: CWE-20

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://docs.apify.com@evil.com/` to pass the ALLOWED_DOC_DOMAINS check and return arbitrary fetched content to the LLM. This issue is fixed in version 0.9.21.

Affected products

• apify-mcp-server: before 0.9.21

References

• https://github.com/apify/apify-mcp-server/commit/e39bdee530da1db0b3b3d3713558b33c9608e629
• https://github.com/apify/apify-mcp-server/pull/781
• https://github.com/apify/apify-mcp-server/releases/tag/v0.9.21
• https://github.com/apify/apify-mcp-server/security/advisories/GHSA-jwp7-wg77-3w9v
• https://github.com/apify/apify-mcp-server/security/advisories/GHSA-jwp7-wg77-3w9v

Get alerted when CVE-2026-46341 or the next vulnerability affects your stack