Unauthenticated MCP SSE Tool Invocation in Network-AI
CVE-2026-48814 is a missing-authentication vulnerability in Network-AI, a TypeScript/Node.js multi-agent orchestrator. In versions 5.7.1 and earlier, the MCP SSE server defaults to an empty authorization secret, and the authorization logic (isAuthorized()) returns true when the secret is missing or empty. Although CVE-2026-46701 previously restricted CORS to localhost origins, that change only reduced browser-based abuse and did not address direct non-browser access. As a result, the SSE MCP server remained effectively unauthenticated by default, particularly when bound to a non-loopback interface. An attacker able to reach the MCP SSE endpoint can invoke all exposed MCP tools, including sensitive operations such as config_set, agent_spawn, blackboard_write, and token* functions, without credentials. The issue was fixed in version 5.7.2 by changing authorization behavior to fail closed when no secret is configured and by requiring a Bearer token that matches the configured secret.
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Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
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Remediation
Patch, then assume compromise.
Exploits
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Recent activity
6 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A critical missing authentication vulnerability in the Network-AI McpSseServer transport layer that allows unauthenticated remote access to administrative orchestration functions when no secret is configured.
An authentication bypass vulnerability in the Network-AI MCP SSE server caused by an empty default secret, allowing unauthenticated invocation of MCP tools in versions 5.7.1 and earlier.
The version that knows your environment.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.