Serial number: AV26-976 Date: September 29, 2026 As of September 29, 2026, Mozilla is affected by vulnerabilities in the following products: Firefox ESR Versions prior to 153.4 Versions prior to 140.17 Versions prior to 115.42 Firefox Versions prior to 157 The Cyber Centre encourages users and administrators to review the provided web links and apply any necessary updates as they become available.
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Some of the flaws could allow remote attackers to execute arbitrary code or escape the browser sandbox.
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