What is CVE-2026-39889?

CVE-2026-39889 is a high-severity vulnerability in Mervinpraison Praisonai, classified under Information Disclosure. CVSS score: 7.5/10. Published 2026-04-08.

How severe is CVE-2026-39889?

High severity. CVSS v3 base score is 7.5 out of 10.

Information disclosure in Mervinpraison Praisonai

CVE-2026-39889

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…

Vulnerability class: Information Disclosure

EPSS: 0.000 (5.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Mervinpraison Praisonai — versions < 4.5.115

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-f292-66h9-fpmf (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-39889?: CVE-2026-39889 is a high-severity vulnerability in Mervinpraison Praisonai, classified under Information Disclosure. CVSS score: 7.5/10. Published 2026-04-08.
How severe is CVE-2026-39889?: High severity. CVSS v3 base score is 7.5 out of 10.