CVE-2026-40157: Praison Praisonai

High severity, CVSS 8.8. EPSS: 0.5% chance of exploitation in the next 30 days.

PraisonAI is a multi-agent teams system. Prior to 4.5.128, cmd_unpack in the recipe CLI extracts .praison tar archives using raw tar.extract() without validating archive member paths. A .praison bundle containing ../../ entries will write files outside the intended output directory. An attacker who distributes a malicious bundle can overwrite arbitrary files on the victim's filesystem when they run praisonai recipe unpack. This vulnerability is fixed in 4.5.128.

Affected products

• Praison Praisonai: before 4.5.128 (fixed in 4.5.128)

Published 2026-04-10. Last modified 2026-06-17.