VULNERABILITY INTELLIGENCE

CVE-2026-8950

CVSS score9.3 CRITICAL
EPSS probability0.19%
CISA KEVNot currently listed
Published2026-05-19
Last modified2026-10-14
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

Description

Same-origin policy bypass in the Networking: HTTP component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.

Weakness classification

  • CWE-346: Origin Validation Error

Primary references