CVE-2026-34935

CRITICAL

PraisonAI: OS Command Injection in MCPHandler.parse_mcp_command()

Title source: cna

Description

PraisonAI is a multi-agent teams system. From version 4.5.15 to before version 4.5.69, the --mcp CLI argument is passed directly to shlex.split() and forwarded through the call chain to anyio.open_process() with no validation, allowlist check, or sanitization at any hop, allowing arbitrary OS command execution as the process user. This issue has been patched in version 4.5.69.

References (2)

[X_Refsource_Confirm] https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-9gm9-c8mq-vq7m

[X_Refsource_Misc] https://github.com/MervinPraison/PraisonAI/commit/47bff65413beaa3c21bf633c1fae4e684348368c

View Writeup ZIP pw:eip

Scores

CVSS v3 9.8

EPSS 0.0004

EPSS Percentile 10.8%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment

Exploitation poc

Automatable yes

Technical Impact total

Details

CWE

CWE-78

Status published

Products (3)

MervinPraison/PraisonAI >= 4.5.15, < 4.5.69

praison/praisonai 4.5.15 - 4.5.69

pypi/praisonai 4.5.15 - 4.5.69PyPI

Published Apr 03, 2026

Tracked Since Apr 04, 2026