Mozilla security advisory (AV26-1057)

Serial number: AV26-1057Date: 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. Security Vulnerabilities fixed in Firefox 158 - Mozilla Mozilla Foundation Security Advisory 2026-107 Security Vulnerabilities fixed in Firefox ESR 153.5 - Mozilla Security Vulnerabilities fixed in Thunderbird 158 - Mozilla Security Vulnerabilities fixed in Thunderbird 153.5 - Mozilla Mozilla Foundation Security Advisories - Mozilla