Mozilla security advisory (AV26-604)

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        <div><p><strong>Serial number: </strong>AV26-604<br /><strong>Date: </strong>June&nbsp;16, 2026</p>

On June 16, 2026, Mozilla published security advisories to address vulnerabilities in the following products:

  • Firefox – versions prior to 152
  • Firefox for iOS – versions prior to 152
  • Firefox EST – versions prior to 140.12
  • Firefox ESR – versions prior to 115.37

The Cyber Centre encourages users and administrators to review the provided web links and apply the necessary updates.

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Article Link: Mozilla security advisory (AV26-604) - Canadian Centre for Cyber Security