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firefox-esr vulnerabilities · Page 26

Vulnerabilities published for firefox-esr in the last 30 days: 206. Listed in the KEV catalogue: 0.

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Vulnerabilities: 1358

  1. CVE-2026-2778

    Critical · CVSS 10EPSS 0.56%Fix available

    Sandbox escape due to incorrect boundary conditions in the DOM: Core & HTML component

    Sandbox escape due to incorrect boundary conditions in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.

    • Update to 140.8.0esr-1~deb13u1
    Published Updated
  2. CVE-2026-2776

    Critical · CVSS 10EPSS 0.56%Fix available

    Sandbox escape due to incorrect boundary conditions in the Telemetry component in External Software

    Sandbox escape due to incorrect boundary conditions in the Telemetry component in External Software. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.

    • Update to 140.8.0esr-1~deb13u1
    Published Updated

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