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Case File

CVE-2020-12390

CRITICAL · CVSS 9.8 EPSS 1.58%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2020-05-26 · Last synced 2026-08-04

CyberRota Analysis

This is a critical severity vulnerability with a CVSS score of 9.8. It affects Firefox.

CVE
CVE-2020-12390
Severity
CRITICAL
CVSS
9.8
EPSS
1.58%
Firefox

Original NVD Description

Incorrect origin serialization of URLs with IPv6 addresses could lead to incorrect security checks. This vulnerability affects Firefox < 76.

Related CVEs

Other vulnerabilities affecting the same vendor(s)

CVE-2026-92240 CRITICAL CVE-2026-92239 HIGH CVE-2026-92238 CRITICAL CVE-2026-84642 HIGH CVE-2026-84641 HIGH CVE-2026-84640 HIGH