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CVE-2019-11707CISA KEV

Mozilla Firefox and Thunderbird Type Confusion Vulnerability

CISA lists this Mozilla Firefox and Thunderbird vulnerability as known exploited. The vendor's advisory has the fixed versions.

CISA KEVVendor advisoryNVD

CISA catalog record

Mozilla Firefox and Thunderbird contain a type confusion vulnerability that can occur when manipulating JavaScript objects due to issues in Array.pop, allowing for an exploitable crash.

Product
Firefox and Thunderbird
Added to KEV
23 May 2022
Federal remediation due
13 Jun 2022
Known ransomware use
Not reported

What changed

First observed 14 Oct 2026

No field changes in the recorded history.

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ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 14 Oct 11:21 UTC · 251 of 253 readable · 250 fully read · documentation 0/409 current

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