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[ CVE-2026-61435 · Published 15 Jul 2026 ]

PraisonAI: Call API localhost-only authentication bypass via spoofed Host header

CVSS 8.2 EPSS <1%Fix available

[ Why it matters ]Priority signals

  • Public proof-of-concept exploit exists (CISA SSVC)

[ Description ]Official description

PraisonAI before 4.6.78 contains an authentication bypass in the Call API agent invocation endpoints (src/praisonai/praisonai/api/agent_invoke.py) when PRAISONAI_CALL_AUTH=disabled is configured. The safeguard intended to restrict the disabled-auth opt-out to localhost binding derives the bind host from request.url.hostname, which is taken from the client-controlled HTTP Host header. A remote, unauthenticated attacker who can reach the service over the network can send a spoofed 'Host: 127.0.0.1' header to bypass the localhost-only restriction and list (GET /api/v1/agents) and invoke (POST /api/v1/agents/{agent_id}/invoke) registered agents without authentication.

[ Fixes ]Fixes and patches

  • praisonai 4.6.78Fixed version · GitHub Advisories · pip package praisonai: upgrade to 4.6.78 or later (affected <= 4.6.77)

[ Packages ]Affected open-source packages

[ References ]References