CVE-2026-34955CWE-78

PraisonAI: Sandbox Escape via shell=True and Bypassable Blocklist in SubprocessSandbox

High · published April 3, 2026

CVSS v3.1
8.8
EPSS
0%
Percentile
31.9
In the wild
Unconfirmed
What it is

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 commands. The blocklist does not include sh or bash as standalone executables, allowing trivial sandbox escape in STRICT mode via sh -c '<command>'. This issue has been patched in version 4.5.97.

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00390 · 31.9th percentile
Weakness
CWE-78 · Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Published
2026-04-03T23:04Z
EPSS history
Timeline
  • 03 APR 23:04Z
    PraisonAI: Sandbox Escape via shell=True and Bypassable Blocklist in SubprocessSandbox
    cvelistv5