{"id":"CVE-2020-26974","details":"When flex-basis was used on a table wrapper, a StyleGenericFlexBasis object could have been incorrectly cast to the wrong type. This resulted in a heap user-after-free, memory corruption, and a potentially exploitable crash. This vulnerability affects Firefox \u003c 84, Thunderbird \u003c 78.6, and Firefox ESR \u003c 78.6.","modified":"2026-03-14T14:46:29.153755Z","published":"2021-01-07T14:15:12Z","related":["MGASA-2020-0461","MGASA-2020-0462","SUSE-SU-2020:14584-1","SUSE-SU-2020:3900-1","SUSE-SU-2020:3901-1","SUSE-SU-2020:3902-1","SUSE-SU-2020:3903-1","SUSE-SU-2020:3935-1","openSUSE-SU-2020:2317-1","openSUSE-SU-2020:2318-1","openSUSE-SU-2020:2324-1","openSUSE-SU-2020:2325-1","openSUSE-SU-2024:10600-1","openSUSE-SU-2024:10601-1","openSUSE-SU-2024:14572-1"],"references":[{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2020-54/"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2020-55/"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2020-56/"},{"type":"REPORT","url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1681022"}],"affected":[{"database_specific":{"unresolved_ranges":[{"events":[{"introduced":"0"},{"fixed":"84.0"}]},{"events":[{"introduced":"0"},{"fixed":"78.6.0"}]},{"events":[{"introduced":"0"},{"fixed":"78.6.0"}]}],"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-26974.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"}]}