OCTOBER 8, 2026
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Case File

CVE-2026-100777

HIGH · CVSS 8.8 EPSS 0.32%

Source: NVD + CISA KEV + EPSS · Published 2026-09-29 · Last synced 2026-10-08

CyberRota Analysis

AI-Generated

A use-after-free vulnerability in the Graphics: Canvas2D component of Firefox can lead to arbitrary code execution, potentially allowing an attacker to compromise the affected system. Users of Firefox, particularly those on older versions, should prioritize updating to the latest releases, including Firefox ESR 153.4, Firefox 157, or the specified ESR versions, to mitigate this high-severity risk.

CVE
CVE-2026-100777
Severity
HIGH
CVSS
8.8
EPSS
0.32%
Firefox

Original NVD Description

Use-after-free in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.

Related CVEs

Other vulnerabilities affecting the same vendor(s)

CVE-2026-96869 MEDIUM CVE-2026-100832 HIGH CVE-2026-100823 MEDIUM CVE-2026-100820 HIGH CVE-2026-100819 CRITICAL CVE-2026-100818 CRITICAL