{"id":"CVE-2018-5094","url":"https://www.cyber-defence.io/tools/cve/CVE-2018-5094","generatedAt":"2026-10-29T02:46:24.436Z","title":"A heap buffer overflow vulnerability may occur in WebAssembly when \"shrinkElements\" is called followed by garbage collection on memory that is now uninitialized.","description":"A heap buffer overflow vulnerability may occur in WebAssembly when \"shrinkElements\" is called followed by garbage collection on memory that is now uninitialized. This results in a potentially exploitable crash. This vulnerability affects Firefox < 58.","published":"2018-06-11T21:29:12.000Z","lastModified":"2026-06-17T01:59:36.000Z","status":"Modified","sourceIdentifier":"security@mozilla.org","cvss":{"version":"3.0","score":7.5,"severity":"HIGH","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-119"],"affected":["mozilla/firefox","canonical/ubuntu linux"],"epss":{"score":0.14961,"percentile":0.96693,"date":"2026-10-27","history":[{"date":"2026-09-21","score":0.05865,"percentile":0.92923},{"date":"2026-09-22","score":0.15255,"percentile":0.96608}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 15.0%, higher than 97% of all known CVEs. Patch or mitigate before the next change window."},"changes":[{"kind":"epss","label":"EPSS jump","at":"2026-09-22T00:00:00.000Z","detail":{"to":0.15255,"from":0.05865,"percentile":0.96608},"summary":"EPSS moved from 5.9% to 15.3% probability of exploitation in the next thirty days."}],"references":[{"url":"http://www.securityfocus.com/bid/102786","tags":["Third Party Advisory","VDB Entry"],"source":"security@mozilla.org"},{"url":"http://www.securitytracker.com/id/1040270","tags":["Third Party Advisory","VDB Entry"],"source":"security@mozilla.org"},{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1415883","tags":["Issue Tracking","Permissions Required"],"source":"security@mozilla.org"},{"url":"https://usn.ubuntu.com/3544-1/","tags":["Third Party Advisory"],"source":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2018-02/","tags":["Vendor Advisory"],"source":"security@mozilla.org"},{"url":"http://www.securityfocus.com/bid/102786","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securitytracker.com/id/1040270","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1415883","tags":["Issue Tracking","Permissions Required"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://usn.ubuntu.com/3544-1/","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.mozilla.org/security/advisories/mfsa2018-02/","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2018-5094","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}