Mozilla security advisory (AV26-433)

Serial number: AV26-433
Date: May 7, 2026

On May 7, 2026, Mozilla published security advisories to address vulnerabilities in the following products:

• Firefox  – versions prior to 150.0.2
• Firefox ESR – versions prior to 140.10.2
• Firefox ESR – versions prior to 115.35.2

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

• Mozilla Foundation Security Advisory 2026-40
• Mozilla Foundation Security Advisory 2026-41
• Mozilla Foundation Security Advisory 2026-42
• Mozilla Security Advisories