VULNERABILITY INTELLIGENCE

CVE-2026-8948

CVSS score9.1 CRITICAL
EPSS probability0.42%
CISA KEVNot currently listed
Published2026-05-19
Last modified2026-10-14
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Description

Same-origin policy bypass in the DOM: Networking component. This vulnerability was fixed in Firefox 151 and Thunderbird 151.

Weakness classification

  • CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
  • CWE-942: Permissive Cross-domain Policy with Untrusted Domains

Primary references