CVE-2026-40157

| EUVD-2026-21509 CRITICAL
2026-04-10 GitHub_M GHSA-99g3-w8gr-x37c
9.4
CVSS 4.0
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CVSS Vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
P
Scope
X

Lifecycle Timeline

4
Patch Released
Apr 10, 2026 - 20:30 nvd
Patch available
EUVD ID Assigned
Apr 10, 2026 - 17:15 euvd
EUVD-2026-21509
Analysis Generated
Apr 10, 2026 - 17:15 vuln.today
CVE Published
Apr 10, 2026 - 16:47 nvd
CRITICAL 9.4

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.

Analysis

Path traversal in PraisonAI multi-agent teams system (versions prior to 4.5.128) enables arbitrary file overwrite through malicious .praison archive bundles. The cmd_unpack function in recipe CLI performs unvalidated tar extraction, allowing attackers to embed ../ path sequences that escape the intended extraction directory. …

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Remediation

Within 24 hours: Inventory all PraisonAI deployments and identify version numbers; alert users to cease unpacking .praison bundles from untrusted sources and enforce bundle source verification. Within 7 days: Implement file integrity monitoring on systems running PraisonAI and configure network controls to restrict outbound connections from PraisonAI processes. …

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Priority Score

47
Low Medium High Critical
KEV: 0
EPSS: +0.1
CVSS: +47
POC: 0

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CVE-2026-40157 vulnerability details – vuln.today

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