CVE-2026-40157: PraisonAI affected by arbitrary file write via path traversal in `praisonai recipe unpack`

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-04-10 · updated 2026-10-26
Weakness: CWE-22

Description

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

MervinPraison PraisonAI: before 4.5.128 — fixed in 4.5.128

How to fix

Upgrade to a fixed version: MervinPraison PraisonAI 4.5.128. Check the vendor advisory for mitigations.

References

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