EUVD-2026-78424
GHSA-vmf9-xx9w-86wx
Severity by source
AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
Primary rating from Vendor (GitHub_M) · only source for this CVE.
CVSS VectorVendor: GitHub_M
Lifecycle Timeline
4DescriptionCVE.org
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.
AnalysisAI
Unauthenticated MCP tool invocation in PraisonAI (praisonaiagents 0.6.0–1.6.58 and praisonai 3.10.0–4.6.58) lets a malicious website use DNS rebinding to reach a local or internal ToolsMCPServer SSE endpoint on /sse and /messages/, enumerate registered tools, and invoke them with the server user's privileges. The legacy SSE wrapper performs no Host, Origin, or authentication enforcement, while the newer Streamable HTTP transport rejects the same hostile Origin with HTTP 403, isolating the flaw to the legacy SSE path. …
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External POC / Exploit Code
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