What is CVE-2026-39891?

CVE-2026-39891 is a high-severity vulnerability in Mervinpraison Praisonai, classified under Code Injection. CVSS score: 8.8/10. Published 2026-04-08.

How severe is CVE-2026-39891?

High severity. CVSS v3 base score is 8.8 out of 10.

RCE in Mervinpraison Praisonai

CVE-2026-39891

PraisonAI is a multi-agent teams system. Prior to 4.5.115, the create_agent_centric_tools() function returns tools (like acp_create_file) that process file content using template rendering. When user input from agent.start() is passed dire…

Vulnerability class: RCE (Remote Code Execution)

EPSS: 0.000 (6.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Mervinpraison Praisonai — versions < 4.5.115

Weakness classification (CWE)

CWE-94 — Code Injection

References

https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-hwg5-x759-7wjg (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-39891?: CVE-2026-39891 is a high-severity vulnerability in Mervinpraison Praisonai, classified under Code Injection. CVSS score: 8.8/10. Published 2026-04-08.
How severe is CVE-2026-39891?: High severity. CVSS v3 base score is 8.8 out of 10.