CVE-2026-118008

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{"bugzilla": {"description": "firefox: thunderbird: Privilege escalation in the DOM: Navigation component", "id": "2562091", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2562091"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-270", "details": ["Privilege escalation in the DOM: Navigation component. This vulnerability was fixed in Firefox 159 and Thunderbird 159.", "A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue:\nPrivilege escalation in the DOM: Navigation component"], "mitigation": {"lang": "en:us", "value": "--- CME Mitigation Guidance (2026-11-02) ---\nDisclaimer: The following mitigation solutions are provided as a courtesy, pending the application of an official patch. This content was generated utilizing AI tools in conjunction with data from https://cmetaxonomy.org. Customers are advised to independently evaluate and test these temporary mitigations within their own infrastructure.\nThe highest-value action is to enforce strict privilege boundary checks during DOM navigation to prevent script execution from escalating into higher-privileged contexts: upgrade to Firefox 159, Thunderbird 159, which corrects privilege management within the DOM Navigation component to block unprivileged execution in higher-privileged contexts, closing all 2 injection vectors (crafted web page navigation, DOM navigation manipulation). Until patched, this is only a concern on all platforms running Firefox or Thunderbird with JavaScript execution enabled \u2014 Thunderbird email viewing where scripting is disabled by default are unaffected \u2014 so restrict visiting untrusted websites and disable JavaScript execution in web-browsing contexts. These controls limit blast radius and contain exploitation, but they do not fix the underlying improper privilege management flaw \u2014 apply the upstream patch to fully remediate."}, "name": "CVE-2026-118008", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "rhel10/firefox-flatpak", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "rhel10/thunderbird-flatpak", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-10-27T14:05:59Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-118008\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-118008\nhttps://www.mozilla.org/security/advisories/mfsa2026-118/#CVE-2026-118008\nhttps://www.mozilla.org/security/advisories/mfsa2026-121/#CVE-2026-118008"], "statement": "Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.", "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[159,*]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Firefox", "source": "cna", "vendor": "Mozilla"}, "product": "firefox", "vendor": "mozilla"}], "created": "2026-10-27T17:00:06.718815+00:00", "updated": "2026-11-03T02:30:07.571221+00:00", "vendors": ["mozilla", "mozilla$PRODUCT$firefox"]}