CVE Catalog

CVE-2026-57112

HighCVSS 8.3
Published: Translated: NVD NIST

Summary

In PraisonAI, ToolsMCPServer.run_sse() in src/praisonai-agents/praisonaiagents/mcp/mcp_server.py mounts SseServerTransport on the legacy /sse and /messages/ endpoints without default Host, Origin, or authentication enforcement. A malicious website can use DNS rebinding against a reachable local or internal SSE server, supply attacker-controlled Host and Origin headers, enumerate registered tools, and invoke them with the server user's privileges. An initial remediation was released in praisonaiagents 1.6.59 and PraisonAI 4.6.59.

Risk Assessment

An attacker can remotely invoke MCP tools with the server user's privileges, potentially leading to unauthorized operations and system compromise. The risk affects environments where the SSE server is reachable from a victim's browser.

Recommendation

Update praisonaiagents to version 1.6.59 or later and PraisonAI to version 4.6.59 or later. Until patched, restrict network access to the /sse and /messages/ endpoints and enforce Host and Origin header validation.

Other vulnerabilities in PraisonAI

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Original NVD description (English source)

PraisonAI is a multi-agent teams system. From praisonaiagents 0.6.0 until 1.6.59 and PraisonAI 3.10.0 until 4.6.59, ToolsMCPServer.run_sse() in src/praisonai-agents/praisonaiagents/mcp/mcp_server.py mounts SseServerTransport on the legacy /sse and /messages/ endpoints without default Host, Origin, or authentication enforcement. A malicious website can use DNS rebinding against a reachable local or internal SSE server, supply attacker-controlled Host and Origin headers, enumerate registered tools, and invoke them with the server user's privileges. The Streamable HTTP transport rejects the same hostile Origin, which isolates the flaw to the legacy SSE wrapper. An initial remediation was released in praisonaiagents 1.6.59 and PraisonAI 4.6.59.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS