Loading vulnerability…
CVE-2026-100820 is a privilege-escalation vulnerability in the Mozilla Firefox Address Bar component. Mozilla fixed the issue in Firefox 157, Firefox ESR 153.4, and Firefox ESR 140.17.
Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
14 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A privilege-escalation vulnerability in Firefox's Address Bar component.
A privilege-escalation vulnerability in Mozilla Firefox's Address Bar component. It has a CVSS v3.1 score/vector of 8.8 (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H), indicating that user interaction is required but successful exploitation could result in high impact to confidentiality, integrity, and availability.
A vulnerability addressed by a Slackware Mozilla Firefox package update; no technical vulnerability details are provided.
A Mozilla Firefox ESR vulnerability referenced by the plugin; no technical details are provided.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.