What is CVE-2026-40154?

CVE-2026-40154 is a critical-severity vulnerability in Mervinpraison Praisonai, classified under Inclusion of Functionality from Untrusted Control Sphere. CVSS score: 9.3/10. Published 2026-04-09.

How severe is CVE-2026-40154?

Critical severity. CVSS v3 base score is 9.3 out of 10.

Vulnerability in Mervinpraison Praisonai

CVE-2026-40154

PraisonAI is a multi-agent teams system. Prior to 4.5.128, PraisonAI treats remotely fetched template files as trusted executable code without integrity verification, origin validation, or user confirmation, enabling supply chain attacks through malicious templates. This vulnerability is fixed in 4.5.128.

Published 2026-04-09 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.3 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.005 (37.1th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 37.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.005 · change: +0.002

Affected products

Mervinpraison Praisonai — versions < 4.5.128
Praison Praisonai

Weakness classification (CWE)

CWE-829 — Inclusion of Functionality from Untrusted Control Sphere

References

github.com/MervinPraison/PraisonAI/security/advisories/GHSA-pv9q-275h-rh7x (Exploit, Mitigation, Vendor Advisory)

Frequently asked questions

What is CVE-2026-40154?: CVE-2026-40154 is a critical-severity vulnerability in Mervinpraison Praisonai, classified under Inclusion of Functionality from Untrusted Control Sphere. CVSS score: 9.3/10. Published 2026-04-09.
How severe is CVE-2026-40154?: Critical severity. CVSS v3 base score is 9.3 out of 10.