What is CVE-2026-40288?

CVE-2026-40288 is a critical-severity vulnerability in Mervinpraison Praisonai, classified under OS Command Injection. CVSS score: 9.8/10. Published 2026-04-14.

How severe is CVE-2026-40288?

Critical severity. CVSS v3 base score is 9.8 out of 10.

RCE in Mervinpraison Praisonai

CVE-2026-40288

PraisonAI is a multi-agent teams system. In versions below 4.5.139 of PraisonAI and 1.5.140 of praisonaiagents, the workflow engine is vulnerable to arbitrary command and code execution through untrusted YAML files. When praisonai workflow…

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.006 (45.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Mervinpraison Praisonai — versions < 4.5.139
Mervinpraison Praisonaiagents — versions < 1.5.140
Praison Praisonai
Praison Praisonaiagents

Weakness classification (CWE)

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)

Frequently asked questions

What is CVE-2026-40288?: CVE-2026-40288 is a critical-severity vulnerability in Mervinpraison Praisonai, classified under OS Command Injection. CVSS score: 9.8/10. Published 2026-04-14.
How severe is CVE-2026-40288?: Critical severity. CVSS v3 base score is 9.8 out of 10.