CVE-2026-34955: Praison Praisonai

Critical severity, CVSS 10.0. EPSS: 0.4% chance of exploitation in the next 30 days.

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.

Affected products

• Praison Praisonai: before 4.5.97 (fixed in 4.5.97)

Published 2026-04-04. Last modified 2026-07-24.