Canadian Centre for Cyber Security cyber.gc.ca

Mozilla security advisory (AV26-1057)

Imported from official source

October 16, 2026 14:19

Cybersecurity Classified by Officially

Serial number: AV26-1057
Date: October 16, 2026

As of October 13, 2026, Mozilla is affected by vulnerabilities in the following products:

Firefox ESR
- Prior to 153.5
- Prior to 115.43
Firefox
- Prior to 158
Thunderbird
- Prior to 153.5
- Prior to 158

The Cyber Centre encourages users and administrators to review the provided web links and apply any necessary updates as they become available.

This is an extract. The publication continues at the source.

Source: Canadian Centre for Cyber Security. Licence

Read the original at the source: https://cyber.gc.ca/en/alerts-advisories/mozilla-security-advisory-av26-1057

Officially imported this from Canadian Centre for Cyber Security’s own source and shows an extract. If you work there, claiming the profile and verifying the domain lets you choose to show the full text here.

Provenance

Organization: Canadian Centre for Cyber Security — imported from official source
Official source: https://www.cyber.gc.ca/api/cccs/rss/v1/get?feed=alerts_advisories&lang=en ATOM
Imported: October 16, 2026 15:00
Versions: 1 recorded
Identity: https://cyber.gc.ca/en/alerts-advisories/mozilla-security-advisory-av26-1057