{
  "threat_severity" : "Important",
  "public_date" : "2026-07-14T12:15:47Z",
  "bugzilla" : {
    "description" : "firefox: thunderbird: Site isolation issue in the DOM: Navigation component",
    "id" : "2499973",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2499973"
  },
  "cvss3" : {
    "cvss3_base_score" : "8.8",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
    "status" : "verified"
  },
  "cwe" : "CWE-501",
  "details" : [ "We are aware that exploit code for this is public however we are not aware of any attacks in the wild abusing this flaw. This vulnerability was fixed in Firefox 152.0.6, Firefox ESR 115.38, Firefox ESR 140.13, and Thunderbird 140.13.", "A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue:\nWe are aware that exploit code for this is public however we are not aware of any attacks in the wild abusing this flaw." ],
  "statement" : "Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.",
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 10",
    "release_date" : "2026-07-28T00:00:00Z",
    "advisory" : "RHSA-2026:47101",
    "cpe" : "cpe:/o:redhat:enterprise_linux:10.2",
    "package" : "firefox-0:140.13.0-1.el10_2"
  }, {
    "product_name" : "Red Hat Enterprise Linux 10",
    "release_date" : "2026-08-03T00:00:00Z",
    "advisory" : "RHSA-2026:49621",
    "cpe" : "cpe:/o:redhat:enterprise_linux:10.2",
    "package" : "thunderbird-0:140.13.0-1.el10_2"
  }, {
    "product_name" : "Red Hat Enterprise Linux 10.0 Extended Update Support",
    "release_date" : "2026-08-11T00:00:00Z",
    "advisory" : "RHSA-2026:53445",
    "cpe" : "cpe:/o:redhat:enterprise_linux_eus:10.0",
    "package" : "thunderbird-0:140.13.0-1.el10_0"
  }, {
    "product_name" : "Red Hat Enterprise Linux 10.0 Extended Update Support",
    "release_date" : "2026-08-12T00:00:00Z",
    "advisory" : "RHSA-2026:54181",
    "cpe" : "cpe:/o:redhat:enterprise_linux_eus:10.0",
    "package" : "firefox-0:140.13.0-1.el10_0"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7 Extended Lifecycle Support",
    "release_date" : "2026-08-12T00:00:00Z",
    "advisory" : "RHSA-2026:54248",
    "cpe" : "cpe:/o:redhat:rhel_els:7",
    "package" : "firefox-0:140.13.0-1.el7_9"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2026-07-28T00:00:00Z",
    "advisory" : "RHSA-2026:47105",
    "cpe" : "cpe:/a:redhat:enterprise_linux:8",
    "package" : "firefox-0:140.13.0-1.el8_10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2026-08-04T00:00:00Z",
    "advisory" : "RHSA-2026:49922",
    "cpe" : "cpe:/a:redhat:enterprise_linux:8",
    "package" : "thunderbird-0:140.13.0-1.el8_10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support",
    "release_date" : "2026-08-11T00:00:00Z",
    "advisory" : "RHSA-2026:53455",
    "cpe" : "cpe:/a:redhat:rhel_aus:8.4",
    "package" : "thunderbird-0:140.13.0-1.el8_4"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support",
    "release_date" : "2026-08-12T00:00:00Z",
    "advisory" : "RHSA-2026:54180",
    "cpe" : "cpe:/a:redhat:rhel_aus:8.4",
    "package" : "firefox-0:140.13.0-1.el8_4"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On",
    "release_date" : "2026-08-11T00:00:00Z",
    "advisory" : "RHSA-2026:53455",
    "cpe" : "cpe:/a:redhat:rhel_eus_long_life:8.4",
    "package" : "thunderbird-0:140.13.0-1.el8_4"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On",
    "release_date" : "2026-08-12T00:00:00Z",
    "advisory" : "RHSA-2026:54180",
    "cpe" : "cpe:/a:redhat:rhel_eus_long_life:8.4",
    "package" : "firefox-0:140.13.0-1.el8_4"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support",
    "release_date" : "2026-08-11T00:00:00Z",
    "advisory" : "RHSA-2026:53453",
    "cpe" : "cpe:/a:redhat:rhel_aus:8.6",
    "package" : "thunderbird-0:140.13.0-1.el8_6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support",
    "release_date" : "2026-08-12T00:00:00Z",
    "advisory" : "RHSA-2026:54259",
    "cpe" : "cpe:/a:redhat:rhel_aus:8.6",
    "package" : "firefox-0:140.13.0-1.el8_6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On",
    "release_date" : "2026-08-11T00:00:00Z",
    "advisory" : "RHSA-2026:53453",
    "cpe" : "cpe:/a:redhat:rhel_eus_long_life:8.6",
    "package" : "thunderbird-0:140.13.0-1.el8_6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On",
    "release_date" : "2026-08-12T00:00:00Z",
    "advisory" : "RHSA-2026:54259",
    "cpe" : "cpe:/a:redhat:rhel_eus_long_life:8.6",
    "package" : "firefox-0:140.13.0-1.el8_6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.8 Telecommunications Update Service",
    "release_date" : "2026-08-11T00:00:00Z",
    "advisory" : "RHSA-2026:53454",
    "cpe" : "cpe:/a:redhat:rhel_tus:8.8",
    "package" : "thunderbird-0:140.13.0-1.el8_8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.8 Telecommunications Update Service",
    "release_date" : "2026-08-12T00:00:00Z",
    "advisory" : "RHSA-2026:54339",
    "cpe" : "cpe:/a:redhat:rhel_tus:8.8",
    "package" : "firefox-0:140.13.0-1.el8_8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions",
    "release_date" : "2026-08-11T00:00:00Z",
    "advisory" : "RHSA-2026:53454",
    "cpe" : "cpe:/a:redhat:rhel_e4s:8.8",
    "package" : "thunderbird-0:140.13.0-1.el8_8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions",
    "release_date" : "2026-08-12T00:00:00Z",
    "advisory" : "RHSA-2026:54339",
    "cpe" : "cpe:/a:redhat:rhel_e4s:8.8",
    "package" : "firefox-0:140.13.0-1.el8_8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2026-08-03T00:00:00Z",
    "advisory" : "RHSA-2026:47104",
    "cpe" : "cpe:/a:redhat:enterprise_linux:9",
    "package" : "firefox-0:140.13.0-1.el9_8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2026-08-04T00:00:00Z",
    "advisory" : "RHSA-2026:49921",
    "cpe" : "cpe:/a:redhat:enterprise_linux:9",
    "package" : "thunderbird-0:140.13.0-1.el9_8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions",
    "release_date" : "2026-08-11T00:00:00Z",
    "advisory" : "RHSA-2026:53475",
    "cpe" : "cpe:/a:redhat:rhel_e4s:9.2",
    "package" : "thunderbird-0:140.13.0-1.el9_2"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions",
    "release_date" : "2026-08-12T00:00:00Z",
    "advisory" : "RHSA-2026:54185",
    "cpe" : "cpe:/a:redhat:rhel_e4s:9.2",
    "package" : "firefox-0:140.13.0-1.el9_2"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions",
    "release_date" : "2026-08-11T00:00:00Z",
    "advisory" : "RHSA-2026:53444",
    "cpe" : "cpe:/a:redhat:rhel_e4s:9.4",
    "package" : "thunderbird-0:140.13.0-1.el9_4"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions",
    "release_date" : "2026-08-12T00:00:00Z",
    "advisory" : "RHSA-2026:54182",
    "cpe" : "cpe:/a:redhat:rhel_e4s:9.4",
    "package" : "firefox-0:140.13.0-1.el9_4"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9.6 Extended Update Support",
    "release_date" : "2026-08-11T00:00:00Z",
    "advisory" : "RHSA-2026:53446",
    "cpe" : "cpe:/a:redhat:rhel_eus:9.6",
    "package" : "thunderbird-0:140.13.0-1.el9_6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9.6 Extended Update Support",
    "release_date" : "2026-08-12T00:00:00Z",
    "advisory" : "RHSA-2026:54249",
    "cpe" : "cpe:/a:redhat:rhel_eus:9.6",
    "package" : "firefox-0:140.13.0-1.el9_6"
  } ],
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 10",
    "fix_state" : "Affected",
    "package_name" : "rhel10/firefox-flatpak",
    "cpe" : "cpe:/o:redhat:enterprise_linux:10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 10",
    "fix_state" : "Affected",
    "package_name" : "rhel10/thunderbird-flatpak",
    "cpe" : "cpe:/o:redhat:enterprise_linux:10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 6",
    "fix_state" : "Out of support scope",
    "package_name" : "firefox",
    "cpe" : "cpe:/o:redhat:enterprise_linux:6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 6",
    "fix_state" : "Out of support scope",
    "package_name" : "thunderbird",
    "cpe" : "cpe:/o:redhat:enterprise_linux:6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Out of support scope",
    "package_name" : "thunderbird",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2026-15719\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-15719\nhttps://www.mozilla.org/security/advisories/mfsa2026-70/#CVE-2026-15719\nhttps://www.mozilla.org/security/advisories/mfsa2026-72/#CVE-2026-15719" ],
  "name" : "CVE-2026-15719",
  "csaw" : false
}