{"id":"CVE-2026-8090","title":"Use-after-free in the DOM: Networking component","summary":"Use-after-free in the DOM: Networking component. This vulnerability was fixed in Firefox 150.0.2, Firefox ESR 140.10.2, Firefox ESR 115.35.2, Thunderbird 150.0.2, and Thunderbird 140.10.2.","severity":"high","cvss":7.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","cwe":["CWE-416","CWE-825"],"vendor":"mozilla","product":"firefox","affected":["firefox < 115.35.2","firefox < 150.0.2","firefox >= 128.0, < 140.10.2","thunderbird < 140.10.2","thunderbird < 150.0.2"],"patched":["firefox 140.10.2","thunderbird 150.0.2"],"published":"2026-05-07","updated":"2026-07-28","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-8090","references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2034352","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-40/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-41/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-42/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-43/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-44/","label":"security@mozilla.org"},{"url":"https://access.redhat.com/errata/RHSA-2026:19160","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:20566","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:20574","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:21381","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:22325","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:22643","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:24508","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:24509","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:24510","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:24511","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:24516","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:24755","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:24983","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:25015","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:26174","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:26268","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:26269","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:26270","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:26521","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:26536","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:26539","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/security/cve/CVE-2026-8090","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2467709","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-8090.json","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}],"tags":["nvd"],"epss":0.00317,"epssPercentile":0.2482,"ingestedAt":"2026-07-28T13:36:09.425Z","slug":"CVE-2026-8090","body":"## Overview\n\nUse-after-free in the DOM: Networking component. This vulnerability was fixed in Firefox 150.0.2, Firefox ESR 140.10.2, Firefox ESR 115.35.2, Thunderbird 150.0.2, and Thunderbird 140.10.2.\n\n## Affected\n\n- `firefox < 115.35.2`\n- `firefox < 150.0.2`\n- `firefox >= 128.0, < 140.10.2`\n- `thunderbird < 140.10.2`\n- `thunderbird < 150.0.2`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `firefox 140.10.2`\n- `thunderbird 150.0.2`","depth":"twilight","depthScore":40,"depthScoreParts":{"impact":40.2,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}