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CVE-2026-55529

PraisonAI: Origin validation bypass in MCP HTTP Stream transport allows browser-mediated unauthenticated tool execution on local MCP server PUBLISHED

Description (CNA)

PraisonAI is a multi-agent teams system. Prior to praisonai 4.6.58, the MCP HTTP Stream _validate_origin method accepts request_origin.startswith(allowed), so the attacker-controlled localhost.evil.example HTTP origin matches the localhost allowlist. Without an API key, a malicious webpage can submit tools/call requests to the local MCP server and execute exposed tools. This issue is fixed in version 4.6.58.

Affected (CNA)

Vendor / productVersions
MervinPraison / PraisonAIaffected < 4.6.58

CWE

CWE-306, CWE-346

References

ADP enrichment

CISA-ADP

No English description supplied.