CVE-2026-7990

# Conceptual PoC for CVE-2026-7990 # This script demonstrates a check for the vulnerable version and simulates the logic of insufficient input validation. import os import sys def check_vulnerability(): # Simulate checking Chrome version # In a real exploit, the version would be queried from the registry or file system target_version = "148.0.7778.96" current_version = "148.0.7778.95" # Hypothetical vulnerable version # Simple version comparison logic if current_version < target_version: print(f"[+] Vulnerable version found: {current_version}") return True else: print("[-] Patched version found.") return False def simulate_insufficient_validation(): # Simulate the Updater processing a malicious file # The vulnerability lies in not validating the source of the file sufficiently print("[*] Simulating Updater processing a malicious file...") # In the vulnerable scenario, the updater accepts a file path from an untrusted source # and executes operations with high privileges (OS-level) malicious_file_path = "C:\Temp\malicious_update.bin" # Hypothetical insecure operation if os.path.exists(malicious_file_path): print(f"[!] Processing untrusted input: {malicious_file_path}") print("[!] Privilege escalation triggered via Updater component.") return True else: print("[File not found, creating dummy file for demonstration]") with open(malicious_file_path, 'w') as f: f.write("malicious_payload") return simulate_insufficient_validation() if __name__ == "__main__": print("--- CVE-2026-7990 PoC Simulation ---") if check_vulnerability(): simulate_insufficient_validation() else: print("System is not vulnerable to this specific check.")

{"cve": {"id": "CVE-2026-7990", "sourceIdentifier": "[email protected]", "published": "2026-05-06T19:16:49.877", "lastModified": "2026-05-06T23:20:16.747", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Insufficient validation of untrusted input in Updater in Google Chrome on Windows prior to 148.0.7778.96 allowed a local attacker to perform OS-level privilege escalation via a malicious file. (Chromium security severity: Medium)"}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-20"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*", "versionEndExcluding": "148.0.7778.96", "matchCriteriaId": "5E9416A8-4333-4195-983C-78F521AF6245"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*", "matchCriteriaId": "A2572D17-1DE6-457B-99CC-64AFD54487EA"}]}]}], "references": [{"url": "https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop.html", "source": "[email protected]", "tags": ["Vendor Advisory"]}, {"url": "https://issues.chromium.org/issues/498892267", "source": "[email protected]", "tags": ["Issue Tracking", "Permissions Required"]}]}}