CVE-2026-118007

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{"bugzilla": {"description": "firefox: thunderbird: Use-after-free in the JavaScript: GC component", "id": "2562015", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2562015"}, "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-825", "details": ["Use-after-free in the JavaScript: GC 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:\nUse-after-free in the JavaScript: GC 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 disable or restrict JavaScript execution for untrusted web content in client environments: upgrade to Firefox 159, Thunderbird 159, which resolves the use-after-free condition during memory management in the SpiderMonkey JavaScript garbage collection component, closing crafted JavaScript execution triggering garbage collection. Until patched, this is a concern on Clients executing untrusted web content in script-enabled browser contexts across all platforms, so Restrict or disable JavaScript execution in client environments and prevent navigation to untrusted web content. As a compensating measure, Enable Address Space Layout Randomization to randomize process memory targets and impede reliable exploitation. These controls limit blast radius and contain exploitation, but they do not fix the underlying use-after-free defect \u2014 apply the upstream patch to fully remediate.\nHighest-impact CME: CME-1309 Script Engine Restriction (Sandbox / Disable) (high)"}, "name": "CVE-2026-118007", "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-2026-118007\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-118007\nhttps://www.mozilla.org/security/advisories/mfsa2026-118/#CVE-2026-118007\nhttps://www.mozilla.org/security/advisories/mfsa2026-121/#CVE-2026-118007"], "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": "2026-10-27T16:30:07.888655+00:00", "updated": "2026-11-05T20:15:12.894873+00:00", "vendors": ["mozilla", "mozilla$PRODUCT$firefox"]}