CVE-2026-34935CWE-78

PraisonAI: OS Command Injection in MCPHandler.parse_mcp_command()

Critical · published April 3, 2026

CVSS v3.1
9.8
EPSS
1%
Percentile
62.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00992 · 62.2th percentile
Weakness
CWE-78 · Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Published
2026-04-03T22:48Z
EPSS history
Timeline
  • 03 APR 22:48Z
    PraisonAI: OS Command Injection in MCPHandler.parse_mcp_command()
    cvelistv5