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CVE-2026-40153

PraisonAIAgents Affected by Environment Variable Secret Exfiltration via os.path.expandvars() Bypassing shell=False in Shell Tool

Published: Apr 9, 2026Updated: Apr 20, 2026 Sources: CVE List NVDCWE-526
NVD MITRE
7.4CVSSHIGH
EPSS Score
0.3%
Top 81.2%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

PraisonAIAgents is a multi-agent teams system. Prior to 1.5.128, the execute_command function in shell_tools.py calls os.path.expandvars() on every command argument at line 64, manually re-implementing shell-level environment variable expansion despite using shell=False (line 88) for security. This allows exfiltration of secrets stored in environment variables (database credentials, API keys, cloud access keys). The approval system displays the unexpanded $VAR references to human reviewers, creating a deceptive approval where the displayed command differs from what actually executes. This vulnerability is fixed in 1.5.128.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:RS:CC:HI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:NAvailability
None
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Weaknesses

CWE-526

Affected Products

PraisonAIAgentsMervinPraison
Mixed
AI / ML / ai-agent-tooling
praisonaiagentspraison
Mixed
AI / ML / ai-agent-tooling
mervinpraisoncommercialAI / MLaka praisonai, praisonaiagents, featured image
praisoncommercialAI / MLaka praisonai, praisonai agents

Exploitability

Official Patch Available

References

https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-v8g7-9q6v-p3x8
github.com

Timeline

Published
Apr 9, 2026
Last Updated
Apr 20, 2026

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