What is CVE-2026-40112?

CVE-2026-40112 is a medium-severity vulnerability in Mervinpraison Praisonai, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-04-09.

How severe is CVE-2026-40112?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Mervinpraison Praisonai

CVE-2026-40112

PraisonAI is a multi-agent teams system. Prior to 4.5.128, the Flask API endpoint in src/praisonai/api.py renders agent output as HTML without effective sanitization. The _sanitize_html function relies on the nh3 library, which is not list…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.000 (11.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N.

Affected products

Mervinpraison Praisonai — versions < 4.5.128

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-cfg2-mxfj-j6pw (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-40112?: CVE-2026-40112 is a medium-severity vulnerability in Mervinpraison Praisonai, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-04-09.
How severe is CVE-2026-40112?: Medium severity. CVSS v3 base score is 5.4 out of 10.