What is CVE-2026-40158?

CVE-2026-40158 is a high-severity vulnerability in Mervinpraison Praisonai, classified under Code Injection. CVSS score: 8.6/10. Published 2026-04-10.

How severe is CVE-2026-40158?

High severity. CVSS v3 base score is 8.6 out of 10.

RCE in Mervinpraison Praisonai

CVE-2026-40158

PraisonAI is a multi-agent teams system. Prior to 4.5.128, PraisonAI's AST-based Python sandbox can be bypassed using type.__getattribute__ trampoline, allowing arbitrary code execution when running untrusted agent code. The _execute_code_…

Vulnerability class: RCE (Remote Code Execution)

EPSS: 0.000 (2.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.

Affected products

Mervinpraison Praisonai — versions < 4.5.128

Weakness classification (CWE)

References

https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-3c4r-6p77-xwr7 (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-40158?: CVE-2026-40158 is a high-severity vulnerability in Mervinpraison Praisonai, classified under Code Injection. CVSS score: 8.6/10. Published 2026-04-10.
How severe is CVE-2026-40158?: High severity. CVSS v3 base score is 8.6 out of 10.