CVE-2026-39889 — PraisonAI has Unauthenticated SSE Event Stream Exposes All Agent Activity in A2U Server
PraisonAI is a multi-agent teams system. Prior to 4.5.115, the A2U (Agent-to-User) event stream server in PraisonAI exposes all agent activity without authentication. The create…
Published: 2026-04-08 · CVSS: 7.5 · CVSS 3.1
PraisonAI is a multi-agent teams system. Prior to 4.5.115, the A2U (Agent-to-User) event stream server in PraisonAI exposes all agent activity without authentication. The create_a2u_routes() function registers the following endpoints with NO authentication checks: /a2u/info, /a2u/subscribe, /a2u/events/{stream_name}, /a2u/events/sub/{id}, and /a2u/health. This vulnerability is fixed in 4.5.115.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7