CVE-2026-46341 Apify MCP server: Domain Allowlist Bypass in fetch-apify-docs via String Prefix Matching
Attackers can bypass domain allowlists in the Apify MCP server to fetch arbitrary content, potentially exposing sensitive data to AI agents.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-46341?
CVE-2026-46341 is a medium-severity server-side request forgery vulnerability in apify-mcp-server, published on 16 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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.
Which versions are affected by CVE-2026-46341?
2 open source packages ship an affected version, including @apify/actors-mcp-server.
| Package | Affected | Fixed in |
|---|---|---|
@apify/actors-mcp-server npm | All versions | 0.9.21 |
@apify/actors-mcp-server npm | All versions | 0.9.21 |
How do I fix CVE-2026-46341?
Upgrade @apify/actors-mcp-server to 0.9.21 or later.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-46341 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-46341 exists.
Sources
Also known as GHSA-jwp7-wg77-3w9v.