CVE-2026-40153: high-severity vulnerability in MervinPraison PraisonAIAgents
PraisonAIAgents Affected by Environment Variable Secret Exfiltration via os.path.expandvars() Bypassing shell=False in Shell Tool
Published · Updated
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.4epss 0.4%
exploitation probability
0.4%top 69% of all CVEs
observed exploitation
nono source reports it
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:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N
Affected products
MervinPraison · PraisonAIAgentsRelated CVEs — MervinPraison PraisonAIAgents
In the same product, most dangerous first.
CVE-2026-40152MEDIUMPraisonAIAgents has a Path Traversal via Unvalidated Glob Pattern in list_files Bypasses Workspace BoundaryEPSS 0.4%CVE-2026-40160HIGHPraisonAIAgents has SSRF via unvalidated URL in `web_crawl` httpx fallbackEPSS 0.4%CVE-2026-40150HIGHPraisonAIAgents has SSRF and Local File Read via Unvalidated URLs in web_crawl ToolEPSS 0.4%CVE-2026-40111CRITICALPraisonAIAgents has an OS Command Injection via shell=True in Memory Hooks Executor (memory/hooks.py)EPSS 0.3%CVE-2026-40117MEDIUMPraisonAIAgents Affected by Arbitrary File Read via read_skill_file Missing Workspace Boundary and Approval GateEPSS 0.3%