CVE-2026-8950

CriticalCVSS 9.3/10Last modified Oct 14, 2026

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.

Metrics

CVSS 3.1 9.3/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

Weakness enumeration

CWE-346

Affected software

No affected versions have been published.

Timeline

Published
May 19, 2026
Last modified
Oct 14, 2026
NVD status
Analyzed

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CVE-2026-8950: Critical severity, CVSS 9.3 | Vulnix