CVE-2026-29129

import ssl import socket # PoC: Check if the server negotiates a weak cipher or ignores order # This script attempts to connect and verifies the negotiated cipher suite. def check_vulnerability(hostname, port): # Create a context that allows legacy ciphers for testing purposes context = ssl.create_default_context() context.set_ciphers('DEFAULT:@SECLEVEL=0') context.check_hostname = False context.verify_mode = ssl.CERT_NONE print(f"[*] Connecting to {hostname}:{port}...") try: with socket.create_connection((hostname, port)) as sock: with context.wrap_socket(sock, server_hostname=hostname) as ssock: cipher = ssock.cipher() print(f"[+] Connection established.") print(f"[+] Negotiated Cipher: {cipher[0]}") print(f"[+] Protocol Version: {cipher[1]}") # Analyze if the cipher is considered weak weak_ciphers = ['RC4', 'DES', '3DES', 'MD5', 'NULL'] if any(weak in cipher[0] for weak in weak_ciphers): print("[!] WEAK CIPHER DETECTED! The server might be vulnerable to CVE-2026-29129.") else: print("[*] Strong cipher negotiated, but manual verification of preference order is recommended.") except Exception as e: print(f"[-] Error: {e}") if __name__ == "__main__": target = "192.168.1.10" # Replace with target IP check_vulnerability(target, 443)

{"cve": {"id": "CVE-2026-29129", "sourceIdentifier": "[email protected]", "published": "2026-04-09T20:16:24.343", "lastModified": "2026-04-14T14:00:19.050", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Configured cipher preference order not preserved vulnerability in Apache Tomcat.\n\nThis issue affects Apache Tomcat: from 11.0.16 through 11.0.18, from 10.1.51 through 10.1.52, from 9.0.114 through 9.0.115.\n\nUsers are recommended to upgrade to version 11.0.20, 10.1.53 or 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: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": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-327"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*", "versionStartIncluding": "9.0.114", "versionEndExcluding": "9.0.116", "matchCriteriaId": "D1095386-8BA2-47E5-BD8D-F5E9A0A80D88"}, {"vulnerable": true, "criteria": "cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*", "versionStartIncluding": "10.1.51", "versionEndExcluding": "10.1.53", "matchCriteriaId": "69F68887-B315-49A2-94D5-7A9ED489BE58"}, {"vulnerable": true, "criteria": "cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*", "versionStartIncluding": "11.0.16", "versionEndExcluding": "11.0.20", "matchCriteriaId": "CB642368-D598-4F14-88F8-D55CE2C97657"}]}]}], "references": [{"url": "https://lists.apache.org/thread/r4h1t6f8xhxsxfm6c2z5cprolsosho3f", "source": "[email protected]", "tags": ["Mailing List", "Vendor Advisory"]}, {"url": "http://www.openwall.com/lists/oss-security/2026/04/09/22", "source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"]}]}}