CVE-2026-34955

HIGH

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

Title source: cna

Description

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.

References (1)

[X_Refsource_Confirm] https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-r4f2-3m54-pp7q

Scores

CVSS v3 8.8

EPSS 0.0001

EPSS Percentile 2.7%

Attack Vector LOCAL

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

CISA SSVC

Vulnrichment

Exploitation poc

Automatable no

Technical Impact total

Details

CWE

CWE-78

Status published

Products (3)

MervinPraison/PraisonAI < 4.5.97

praison/praisonai < 4.5.97

pypi/praisonai 0 - 4.5.97PyPI

Published Apr 04, 2026

Tracked Since Apr 04, 2026