CVE-2020-12390

CRITICAL

Firefox < 76.0 - Incorrect Origin Serialization via IPv6 URL Handling

Title source: llm

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

Core 2

Core References

Vendor Advisory x_refsource_misc

Permissions Required x_refsource_misc

CVSS v3 9.8

EPSS 0.0147

EPSS Percentile 81.2%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE

CWE-502

Status published

Products (1)

mozilla/firefox < 76.0

Published May 26, 2020

Tracked Since Feb 18, 2026