What is CVE-2026-34938?

CVE-2026-34938 is a critical-severity vulnerability in Mervinpraison Praisonai, classified under Protection Mechanism Failure. CVSS score: 10.0/10. Published 2026-04-03.

How severe is CVE-2026-34938?

Critical severity. CVSS v3 base score is 10.0 out of 10.

Vulnerability in Mervinpraison Praisonai

CVE-2026-34938

PraisonAI is a multi-agent teams system. Prior to version 1.5.90, execute_code() in praisonai-agents runs attacker-controlled Python inside a three-layer sandbox that can be fully bypassed by passing a str subclass with an overridden startswith() method to the _safe_getattr wrapper, achieving arbitrary OS command execution on the host. This issue has been patched in version 1.5.90.

Published 2026-04-03 · last modified 2026-07-24.

CVSS v3 metric

CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.008 (56.2th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 56.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.132 · newest: 0.008 · change: -0.123

Affected products

Mervinpraison Praisonai — versions < 1.5.90
Praison Praisonaiagents

Weakness classification (CWE)

CWE-693 — Protection Mechanism Failure

References

github.com/MervinPraison/PraisonAI/security/advisories/GHSA-6vh2-h83c-9294 (Exploit, Vendor Advisory)

Frequently asked questions

What is CVE-2026-34938?: CVE-2026-34938 is a critical-severity vulnerability in Mervinpraison Praisonai, classified under Protection Mechanism Failure. CVSS score: 10.0/10. Published 2026-04-03.
How severe is CVE-2026-34938?: Critical severity. CVSS v3 base score is 10.0 out of 10.