CVE-2026-39889

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CVSS 3.1

7.5 high

EPSS

<1%p35

Published

Apr 8, 2026 (Apr 8, 2026)

Modified

Jul 24, 2026

Description

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.

Vendors: praison
Products: praisonai
Weakness: CWE-200
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

NVD CVE.org GitHub PoCs EPSS (0.4%)

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