CVE-2026-34476: SSRF in Apache SkyWalking MCP

An attacker successfully exploiting this SSRF vulnerability could potentially gain access to internal services and data that are not directly exposed to the internet. This could include accessing internal APIs, reading configuration files, or even interacting with other internal systems. The scope of the impact depends heavily on the internal network architecture and the sensitivity of the resources accessible from the SkyWalking MCP server. While direct remote code execution is unlikely, the attacker could leverage the SSRF to perform reconnaissance and identify further attack vectors. The ability to make arbitrary requests also opens the door to potential denial-of-service attacks by targeting internal services.

1. Reserved2026-03-28
2. Published2026-04-13
3. Modified2026-04-14
4. EPSS updated2026-04-21

The primary mitigation for CVE-2026-34476 is to upgrade Apache SkyWalking MCP to version 0.2.0 or later, which includes the fix. If upgrading immediately is not feasible, consider implementing temporary workarounds. Restrict network access to the SkyWalking MCP server to only necessary internal resources. Implement strict input validation and sanitization on any URLs used by the application to prevent attackers from injecting malicious URLs. Consider deploying a Web Application Firewall (WAF) with SSRF protection rules to filter out potentially malicious requests. Monitor network traffic for unusual outbound connections originating from the SkyWalking MCP server.