What is CVE-2026-40159?

CVE-2026-40159 is a medium-severity vulnerability in Mervinpraison Praisonai, classified under Information Disclosure. CVSS score: 5.5/10. Published 2026-04-10.

How severe is CVE-2026-40159?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Information disclosure in Mervinpraison Praisonai

CVE-2026-40159

PraisonAI is a multi-agent teams system. Prior to 4.5.128, PraisonAI’s MCP (Model Context Protocol) integration allows spawning background servers via stdio using user-supplied command strings (e.g., MCP("npx -y @smithery/cli ...")). These…

Vulnerability class: Information Disclosure

EPSS: 0.000 (5.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N.

Affected products

Mervinpraison Praisonai — versions < 4.5.128

Weakness classification (CWE)

References

https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-pj2r-f9mw-vrcq (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-40159?: CVE-2026-40159 is a medium-severity vulnerability in Mervinpraison Praisonai, classified under Information Disclosure. CVSS score: 5.5/10. Published 2026-04-10.
How severe is CVE-2026-40159?: Medium severity. CVSS v3 base score is 5.5 out of 10.