{"id":"CVE-2026-100761","title":"Privilege escalation due to use-after-free in the Graphics: WebGPU component","summary":"Privilege escalation due to use-after-free in the Graphics: WebGPU component. This vulnerability was fixed in Thunderbird 157 and Firefox 157.","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","cwe":["CWE-416","CWE-825"],"vendor":"mozilla","product":"firefox","affected":["firefox < 157.0.0","thunderbird < 157.0"],"patched":["firefox 157.0.0","thunderbird 157.0"],"published":"2026-09-29","updated":"2026-10-13","sourceUpdated":"2026-10-13T20:29:06.187","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-100761","references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2059020","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-101/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-97/","label":"security@mozilla.org"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-100761.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-100761"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2543132"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-100761"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-100761"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-97/#CVE-2026-100761"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00225,"epssPercentile":0.13078,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-09-29T13:20:31.281782Z"},"scores":{"nvd":8.8,"vendor":7.5},"ingestedAt":"2026-09-29T13:34:31.653Z","slug":"CVE-2026-100761","body":"## Overview\n\nPrivilege escalation due to use-after-free in the Graphics: WebGPU component. This vulnerability was fixed in Thunderbird 157 and Firefox 157.\n\n## Affected\n\n- `firefox < 157.0.0`\n- `thunderbird < 157.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `firefox 157.0.0`\n- `thunderbird 157.0`\n\n## Vendor advisories\n\n- **Red Hat VEX** · Important · updated 2026-10-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-100761.json)","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":48.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":212694,"id":"CVE-2026-100761","ts":1790692642658,"field":"cvss","old":null,"new":"8.8"},{"seq":212693,"id":"CVE-2026-100761","ts":1790692642658,"field":"severity","old":"none","new":"high"}]}