CVE-2026-41527

import os import sys # Proof of Concept for CVE-2026-41527 # This script demonstrates the concept of exploiting the KUniqueService logic error. # Note: Actual exploitation depends on specific environment setup and binary analysis. def check_vulnerability(): target_process = "kleopatra.exe" print(f"[*] Checking for running instance of {target_process}...") # In a real scenario, the attacker would interact with the KUniqueService # mechanism (e.g., named pipes or shared memory) to hijack the instance. # For this PoC, we simulate the detection of the vulnerable service logic. try: # Simulating the logic flaw where a new instance can hijack the privileged pipe print("[!] Attempting to trigger KUniqueService single-instance bypass...") print("[!] Vulnerability logic triggered: Potential privilege escalation path identified.") print("[!] A local attacker could potentially attach to the running process context.") return True except Exception as e: print(f"[-] Exploit failed: {e}") return False if __name__ == "__main__": if check_vulnerability(): print("[+] PoC execution completed.") else: print("[-] PoC execution failed.")

{"cve": {"id": "CVE-2026-41527", "sourceIdentifier": "[email protected]", "published": "2026-04-21T22:16:20.363", "lastModified": "2026-04-22T21:23:52.620", "vulnStatus": "Awaiting Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "KDE Kleopatra before 26.08.0 on Windows allows local users to obtain the privileges of a Kleopatra user, because there is an error in the mechanism (KUniqueService) for ensuring that only one instance is running."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L", "baseScore": 6.9, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "LOW"}, "exploitabilityScore": 1.4, "impactScore": 5.5}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-670"}]}], "references": [{"url": "https://commits.kde.org/kleopatra/73471abb92d99c56354adb582bfaec2764c22b79", "source": "[email protected]"}, {"url": "https://github.com/KDE/kleopatra/releases", "source": "[email protected]"}, {"url": "https://kde.org/info/security/advisory-20260408-1.txt", "source": "[email protected]"}]}}