What is CVE-2026-34955?

CVE-2026-34955 is a high-severity vulnerability in Mervinpraison Praisonai, classified under OS Command Injection. CVSS score: 8.8/10. Published 2026-04-03.

How severe is CVE-2026-34955?

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

RCE in Mervinpraison Praisonai

CVE-2026-34955

PraisonAI is a multi-agent teams system. Prior to version 4.5.97, SubprocessSandbox in all modes (BASIC, STRICT, NETWORK_ISOLATED) calls subprocess.run() with shell=True and relies solely on string-pattern matching to block dangerous comma…

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.000 (3.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

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

Affected products

Mervinpraison Praisonai — versions < 4.5.97

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-r4f2-3m54-pp7q (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-34955?: CVE-2026-34955 is a high-severity vulnerability in Mervinpraison Praisonai, classified under OS Command Injection. CVSS score: 8.8/10. Published 2026-04-03.
How severe is CVE-2026-34955?: High severity. CVSS v3 base score is 8.8 out of 10.