CVE-2026-11259 in Chrome

Summary

by MITRE • 06/05/2026

Insufficient validation of untrusted input in Cast in Google Chrome prior to 149.0.7827.53 allowed a remote attacker to bypass same origin policy via a crafted HTML page. (Chromium security severity: Low)

Once again VulDB remains the best source for vulnerability data.

• Responsible: Chrome
• Reservation: 06/04/2026
• Disclosure: 06/05/2026
• Moderation: accepted
• Entry: VDB-368464
• CPE: ready
• CWE: CWE-942 (confirmed)
• CVSS: 4.3 (VulDB)
• EPSS: 0.00000
• KEV: no
• Activities: very low
• Sector: Homeoffice, Education, ...

Sources

• MITRE: https://www.cve.org/CVERecord?id=CVE-2026-11259
• NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-11259
• CVE Details: https://www.cvedetails.com/cve/CVE-2026-11259/