CVE-2026-29145

import requests import urllib3 urllib3.disable_warnings(urllib3.exceptions.InsecureRequestWarning) def check_vulnerability(target_url): """ PoC for CVE-2026-29145: Apache Tomcat Client Cert Auth Bypass Checks if the target allows access without a valid client certificate when 'soft fail' is disabled. """ try: response = requests.get(target_url, verify=False, timeout=10) if response.status_code == 200: print(f"[+] Potential Vulnerability Detected! Status: {response.status_code}") else: print(f"[-] Not vulnerable or protected. Status: {response.status_code}") except Exception as e: print(f"Error: {e}") if __name__ == "__main__": target = "https://example-tomcat-server.com/protected" check_vulnerability(target)

{"cve": {"id": "CVE-2026-29145", "sourceIdentifier": "[email protected]", "published": "2026-04-09T20:16:24.447", "lastModified": "2026-04-14T13:22:28.357", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "CLIENT_CERT authentication does not fail as expected for some scenarios when soft fail is disabled vulnerability in Apache Tomcat, Apache Tomcat Native.\n\nThis issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.18, from 10.1.0-M7 through 10.1.52, from 9.0.83 through 9.0.115; Apache Tomcat Native: from 1.1.23 through 1.1.34, from 1.2.0 through 1.2.39, from 1.3.0 through 1.3.6, from 2.0.0 through 2.0.13.\n\nUsers are recommended to upgrade to version Tomcat Native 1.3.7 or 2.0.14 and Tomcat 11.0.20, 10.1.53 and 9.0.116, which fix the issue."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N", "baseScore": 9.1, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.9, "impactScore": 5.2}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-287"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*", "versionStartIncluding": "9.0.83", "versionEndExcluding": "9.0.116", "matchCriteriaId": "2F4C25F3-54B7-42C3-9CEE-853D64F538B9"}, {"vulnerable": true, "criteria": "cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*", "versionStartIncluding": "10.1.1", "versionEndExcluding": "10.1.53", "matchCriteriaId": "6A9752F3-66FC-41BC-BBB9-50AC9A7DBC55"}, {"vulnerable": true, "criteria": "cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*", "versionStartIncluding": "11.0.0", "versionEndExcluding": "11.0.20", "matchCriteriaId": "1F39B82B-0E67-459D-8065-2C6EE7970D0D"}, {"vulnerable": true, "criteria": "cpe:2.3:a:apache:tomcat:10.1.0:-:*:*:*:*:*:*", "matchCriteriaId": "8AF99366-B85F-447F-90EF-E4F163193A78"}, {"vulnerable": true, "criteria": "cpe:2.3:a:apache:tomcat:10.1.0:milestone10:*:*:*:*:*:*", "matchCriteriaId": "33C71AE1-B38E-4783-BAC2-3CDA7B4D9EBA"}, {"vulnerable": true, "criteria": "cpe:2.3:a:apache:tomcat:10.1.0:milestone11:*:*:*:*:*:*", "matchCriteriaId": "F6BD4180-D3E8-42AB-96B1-3869ECF47F6C"}, {"vulnerable": true, "criteria": "cpe:2.3:a:apache:tomcat:10.1.0:milestone12:*:*:*:*:*:*", "matchCriteriaId": "64668CCF-DBC9-442D-9E0F-FD40E1D0DDB7"}, {"vulnerable": true, "criteria": "cpe:2.3:a:apache:tomcat:10.1.0:milestone13:*:*:*:*:*:*", "matchCriteriaId": "FC64BB57-4912-481E-AE8D-C8FCD36142BB"}, {"vulnerable": true, "criteria": "cpe:2.3:a:apache:tomcat:10.1.0:milestone14:*:*:*:*:*:*", "matchCriteriaId": "49B43BFD-6B6C-4E6D-A9D8-308709DDFB44"}, {"vulnerable": true, "criteria": "cpe:2.3:a:apache:tomcat:10.1.0:milestone15:*:*:*:*:*:*", "matchCriteriaId": "919C16BD-79A7-4597-8D23-2CBDED2EF615"}, {"vulnerable": true, "criteria": "cpe:2.3:a:apache:tomcat:10.1.0:milestone16:*:*:*:*:*:*", "matchCriteriaId": "81B27C03-D626-42EC-AE4E-1E66624908E3"}, {"vulnerable": true, "criteria": "cpe:2.3:a:apache:tomcat:10.1.0:milestone17:*:*:*:*:*:*", "matchCriteriaId": "BD81405D-81A5-4683-A355-B39C912DAD2D"}, {"vulnerable": true, "criteria": "cpe:2.3:a:apache:tomcat:10.1.0:milestone18:*:*:*:*:*:*", "matchCriteriaId": "2DCE3576-86BC-4BB8-A5FB-1274744DFD7F"}, {"vulnerable": true, "criteria": "cpe:2.3:a:apache:tomcat:10.1.0:milestone19:*:*:*:*:*:*", "matchCriteriaId": "5571F54A-2EAC-41B6-BDA9-7D33CFE97F70"}, {"vulnerable": true, "criteria": "cpe:2.3:a:apache:tomcat:10.1.0:milestone20:*:*:*:*:*:*", "matchCriteriaId": "ED30E850-C475-4133-BDE3-74CB3768D787"}, {"vulnerable": true, "criteria": "cpe:2.3:a:apache:tomcat:10.1.0:milestone7:*:*:*:*:*:*", "matchCriteriaId": "941FCF7B-FFB6-4967-95C7-BB3D32C73DAF"}, {"vulnerable": true, "criteria": "cpe:2.3:a:apache:tomcat:10.1.0:milestone8:*:*:*:*:*:*", "matchCriteriaId": "CE1A9030-B397-4BA6-8E13-DA1503872DDB"}, {"vulnerable": true, "criteria": "cpe:2.3:a:apache:tomcat:10.1.0:milestone9:*:*:*:*:*:*", "matchCriteriaId": "6284B74A-1051-40A7-9D74-380FEEEC3F88"}, {"vulnerable": true, "criteria": "cpe:2.3:a:apache:tomcat_native:*:*:*:*:*:*:*:*", "versionStartIncluding": "1.1.23", "versionEndExcluding": "1.3.7", "matchCriteriaId": "4285FB15-C93B-498C-9DA1-E5C3364A0280"}, {"vulnerable": true, "criteria": "cpe:2.3:a:apache:tomcat_native:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.0.0", "versionEndExcluding": "2.0.14", "matchCriteriaId": "89778321-0002-4D5F-85DB-EAE3CB9B53CA"}]}]}], "references": [{"url": "https://lists.apache.org/thread/yz5fxmhd2j43wgqykssdo7kltws57jfz", "source": "[email protected]", "tags": ["Mailing List", "Vendor Advisory"]}, { ... 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