SEPTEMBER 18, 2026
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Case File

CVE-2026-8956

CRITICAL · CVSS 9.8 EPSS 0.60%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2026-05-19 · 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-2026-8956
Severity
CRITICAL
CVSS
9.8
EPSS
0.60%
Firefox

Original NVD Description

Integer overflow in the Networking: JAR component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.

Related CVEs

Other vulnerabilities affecting the same vendor(s)

CVE-2026-84642 HIGH CVE-2026-84641 HIGH CVE-2026-84640 HIGH CVE-2026-84639 CRITICAL CVE-2026-84637 CRITICAL CVE-2026-84145 HIGH