AUGUST 4, 2026
Live Feed
Back to database
Case File

CVE-2016-5259

HIGH · CVSS 8.8 EPSS 3.26%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2016-08-05 · Last synced 2026-08-04

CyberRota Analysis

This is a high severity vulnerability with a CVSS score of 8.8. It affects Firefox. It may be remotely exploitable.

CVE
CVE-2016-5259
Severity
HIGH
CVSS
8.8
EPSS
3.26%
Firefox

Original NVD Description

Use-after-free vulnerability in the CanonicalizeXPCOMParticipant function in Mozilla Firefox before 48.0 and Firefox ESR 45.x before 45.3 allows remote attackers to execute arbitrary code via a script that closes its own Service Worker within a nested sync event loop.