high7.5
CVE-2026-39889
PraisonAI Has Unauthenticated SSE Event Stream that Exposes All Agent Activity in A2U Server
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | praisonai | <= 4.5.114 | 4.5.115 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Praison | Praisonai | through 4.5.114 |