CVE-2026-39889
High · 7.5CVSS
7.5
EPSS
0.5%
Published
Apr 8, 2026
CISA due date
—
The record
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 | Introduced | Fixed |
|---|
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