{"id":"CVE-2026-100817","title":"Other issue in the JavaScript: WebAssembly component","summary":"Other issue in the JavaScript: WebAssembly component. This vulnerability was fixed in Thunderbird 157 and Firefox 157.","severity":"medium","cvss":5.4,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","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":"2026-10-06","sourceUpdated":"2026-10-06T14:35:41.210","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-100817","references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2068670","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"}],"tags":["nvd","cve.org"],"epss":0.00197,"epssPercentile":0.09354,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-01T15:36:50.438550Z"},"ingestedAt":"2026-09-29T13:34:31.675Z","slug":"CVE-2026-100817","body":"## Overview\n\nOther issue in the JavaScript: WebAssembly 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`","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":29.7,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":214565,"id":"CVE-2026-100817","ts":1790881065909,"field":"cvss","old":null,"new":"5.4"},{"seq":214564,"id":"CVE-2026-100817","ts":1790881065909,"field":"severity","old":"none","new":"medium"}]}