Canadian Cyber Centre advises updating Firefox to version 159.0.1 or later
VULNERABILITYFirefoxredteam/daily · 1 source
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What happened
Advisory AV26-1131 from the Canadian Centre for Cyber Security says Firefox versions prior to 159.0.1 are affected by a vulnerability, as of 3 November 2026. Mozilla's fixes are listed in its security advisories for Firefox 159.0.1, and the Cyber Centre urges users and administrators to apply the updates.
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What to do
- Update Firefox to version 159.0.1 or later.
- Review the Mozilla security advisories for Firefox 159.0.1 for details of the fixed vulnerabilities.
- Administrators should check that managed Firefox installations have been updated.
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Who reported · 1 outlet
Canadian Centre for Cyber Security
Who and what is in it
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