AUGUST 25, 2026
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Case File

CVE-2026-12299

MEDIUM · CVSS 5.4 EPSS 0.31%

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

CyberRota Analysis

This is a medium severity vulnerability with a CVSS score of 5.4. It affects Firefox.

CVE
CVE-2026-12299
Severity
MEDIUM
CVSS
5.4
EPSS
0.31%
Firefox

Original NVD Description

JIT miscompilation in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12.

Related CVEs

Other vulnerabilities affecting the same vendor(s)

CVE-2026-75874 CRITICAL CVE-2026-74990 CRITICAL CVE-2026-74989 CRITICAL CVE-2026-74988 CRITICAL CVE-2026-74987 CRITICAL CVE-2026-74983 HIGH