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Use After Free Affecting firefox-esr package, versions <60.4.0esr-1

Severity

 Recommended
0.0
critical
0
10

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Threat Intelligence

EPSS
9.65% (95th percentile)

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  • Snyk IDSNYK-ECHOLATEST-FIREFOXESR-18169160
  • published22 Jul 2026
  • disclosed28 Feb 2019
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Introduced: 28 Feb 2019

CVE-2018-18492  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade Echo:latest firefox-esr to version 60.4.0esr-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream firefox-esr package and not the firefox-esr package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

A use-after-free vulnerability can occur after deleting a selection element due to a weak reference to the select element in the options collection. This results in a potentially exploitable crash. This vulnerability affects Thunderbird < 60.4, Firefox ESR < 60.4, and Firefox < 64.