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        "text": "An update for firefox is now available for Red Hat Enterprise Linux 8.\n\nRed Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.",
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        "text": "Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.\n\nSecurity Fix(es):\n\n* firefox: thunderbird: Sandbox escape in the DOM: Workers component (CVE-2026-12294)\n\n* firefox: thunderbird: Information disclosure, sandbox escape in the Security: Process Sandboxing component (CVE-2026-12313)\n\n* firefox: thunderbird: Information disclosure, sandbox escape in the Security: Process Sandboxing component (CVE-2026-12311)\n\n* firefox: thunderbird: Memory safety bug fixed in Thunderbird ESR 140.12 (CVE-2026-12290)\n\n* firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.12, Thunderbird ESR 140.12, Firefox 152 and Thunderbird 152 (CVE-2026-12327)\n\n* firefox: thunderbird: JIT miscompilation in the DOM: Core \u0026 HTML component (CVE-2026-12299)\n\n* firefox: thunderbird: Memory safety bug fixed in Thunderbird ESR 140.12 (CVE-2026-12329)\n\n* firefox: thunderbird: Memory safety bug fixed in Thunderbird ESR 140.12 (CVE-2026-12312)\n\n* firefox: thunderbird: Mitigation bypass in the DOM: Security component (CVE-2026-12302)\n\n* firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.37, Firefox ESR 140.12, Thunderbird ESR 140.12, Firefox 152 and Thunderbird 152 (CVE-2026-12328)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Internationalization component (CVE-2026-12330)\n\n* firefox: thunderbird: Memory safety bug fixed in Thunderbird ESR 140.12 (CVE-2026-12314)\n\n* firefox: thunderbird: Memory safety bug fixed in Thunderbird ESR 140.12 (CVE-2026-12309)\n\n* firefox: thunderbird: Memory safety bug fixed in Thunderbird ESR 140.12 (CVE-2026-12310)\n\n* firefox: thunderbird: Denial-of-service in the Graphics: ImageLib component (CVE-2026-12325)\n\n* firefox: thunderbird: Sandbox escape in the DOM: Navigation component (CVE-2026-12295)\n\n* firefox: thunderbird: Privilege escalation in the Graphics: WebRender component (CVE-2026-12289)\n\n* firefox: thunderbird: Mitigation bypass in the DOM: Security component (CVE-2026-12315)\n\n* firefox: thunderbird: Sandbox escape in the Security: Process Sandboxing component (CVE-2026-12296)\n\n* firefox: thunderbird: Memory safety bug fixed in Thunderbird ESR 140.12 (CVE-2026-12306)\n\n* firefox: thunderbird: Memory safety bug fixed in Thunderbird ESR 140.12 (CVE-2026-12307)\n\n* firefox: thunderbird: Sandbox escape due to incorrect boundary conditions in the Networking component (CVE-2026-12297)\n\n* firefox: thunderbird: Memory safety bug fixed in Thunderbird ESR 140.12 (CVE-2026-12305)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Web Audio component (CVE-2026-12292)\n\n* firefox: thunderbird: Memory safety bug fixed in Thunderbird ESR 140.12 (CVE-2026-12308)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Graphics: CanvasWebGL component (CVE-2026-12324)\n\n* firefox: thunderbird: Same-origin policy bypass in the Networking: Cookies component (CVE-2026-12304)\n\n* firefox: thunderbird: Use-after-free in the Networking: HTTP component (CVE-2026-12291)\n\n* firefox: thunderbird: Memory safety bug fixed in Firefox ESR 140.12 (CVE-2026-12298)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.",
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          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-12330",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-12330"
        },
        {
          "category": "external",
          "summary": "https://www.mozilla.org/security/advisories/mfsa2026-58/#CVE-2026-12330",
          "url": "https://www.mozilla.org/security/advisories/mfsa2026-58/#CVE-2026-12330"
        },
        {
          "category": "external",
          "summary": "https://www.mozilla.org/security/advisories/mfsa2026-61/#CVE-2026-12330",
          "url": "https://www.mozilla.org/security/advisories/mfsa2026-61/#CVE-2026-12330"
        }
      ],
      "release_date": "2026-06-16T11:53:03.839000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-06-22T03:17:11+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:27717"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.1,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
            "version": "3.1"
          },
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      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "firefox: thunderbird: Incorrect boundary conditions in the Internationalization component"
    }
  ]
}