What is CVE-2026-40088?

CVE-2026-40088 is a critical-severity vulnerability in Mervinpraison Praisonai, classified under OS Command Injection. CVSS score: 9.7/10. Published 2026-04-09.

How severe is CVE-2026-40088?

Critical severity. CVSS v3 base score is 9.7 out of 10.

RCE in Mervinpraison Praisonai

CVE-2026-40088

PraisonAI is a multi-agent teams system. Prior to 4.5.121, the execute_command function and workflow shell execution are exposed to user-controlled input via agent workflows, YAML definitions, and LLM-generated tool calls, allowing attacke…

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.001 (23.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.7 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.

Affected products

Mervinpraison Praisonai — versions < 4.5.121

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-2763-cj5r-c79m (x_refsource_CONFIRM)
https://github.com/MervinPraison/PraisonAI/releases/tag/v4.5.121 (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-40088?: CVE-2026-40088 is a critical-severity vulnerability in Mervinpraison Praisonai, classified under OS Command Injection. CVSS score: 9.7/10. Published 2026-04-09.
How severe is CVE-2026-40088?: Critical severity. CVSS v3 base score is 9.7 out of 10.