What is CVE-2026-47391?

CVE-2026-47391 is a critical-severity vulnerability in Mervinpraison Praisonai, classified under Eval Injection. CVSS score: 9.8/10. Published 2026-07-21.

How severe is CVE-2026-47391?

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

RCE in Mervinpraison Praisonai

CVE-2026-47391

PraisonAI is a multi-agent teams system. Prior to version 4.6.40, PraisonAI's first-party A2A server example exposes an unauthenticated A2A JSON-RPC endpoint and registers a `calculate(expression)` tool implemented with Python `eval()`. Th…

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 < 4.6.40

Weakness classification (CWE)

CWE-95 — Eval Injection
CWE-306 — Missing Authentication for Critical Function

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-47391?: CVE-2026-47391 is a critical-severity vulnerability in Mervinpraison Praisonai, classified under Eval Injection. CVSS score: 9.8/10. Published 2026-07-21.
How severe is CVE-2026-47391?: Critical severity. CVSS v3 base score is 9.8 out of 10.