AUGUST 17, 2026
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Case File

CVE-2026-12304

CRITICAL · CVSS 9.1 EPSS 0.19%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2026-06-16 · Last synced 2026-08-04

CyberRota Analysis

This is a critical severity vulnerability with a CVSS score of 9.1. It affects Firefox.

CVE
CVE-2026-12304
Severity
CRITICAL
CVSS
9.1
EPSS
0.19%
Firefox

Original NVD Description

Same-origin policy bypass in the Networking: Cookies component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.

Related CVEs

Other vulnerabilities affecting the same vendor(s)

CVE-2026-14899 HIGH CVE-2026-16412 CRITICAL CVE-2026-16411 CRITICAL CVE-2026-16410 CRITICAL CVE-2026-16409 HIGH CVE-2026-16408 CRITICAL