{"id":"CLSA-2026-1783517292","summary":"thunderbird: Fix of 3 CVEs","details":"- CVE-2026-2770: keep construction depth for custom elements in sync;\n  wrap AutoConstructionDepth in mozilla::Maybe so early throws in\n  HTMLConstructor still tear it down deterministically (Bug 2014585)\n- CVE-2026-2763: use-after-free in SuppressDeletedProperty during\n  property iteration; replace GetPrototype + GetPropertyDescriptor\n  (both CanGC/re-entrant) with staticPrototype() + LookupPropertyPure()\n  + GetPropertyAttributes() in js/src/vm/Iteration.cpp (Bug 2012018)\n- CVE-2026-2764: JIT baseline CacheIR call-scripted stub could observe\n  a not-yet-created `this` if it OOM'd between reservation and\n  construction; create `this` after pushing arguments and thread the\n  argument through pushArguments/CreateThis paths (Bug 2012608)","modified":"2026-10-26T09:43:14.768887271Z","published":"2026-07-08T13:28:31Z","upstream":["CVE-2026-2763","CVE-2026-2764","CVE-2026-2770"],"references":[{"type":"ADVISORY","url":"https://errata.tuxcare.com/els_os/almalinux9.2esu/CLSA-2026-1783517292.html"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-2763"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-2764"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-2770"}],"affected":[{"package":{"name":"thunderbird","ecosystem":"TuxCare:AlmaLinux:9.2","purl":"pkg:rpm/tuxcare/thunderbird?distro=almalinux-9.2"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"115.4.1-1.el9_2.alma.tuxcare.els18"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.2esu/CLSA-2026-1783517292.json"}}],"schema_version":"1.9.0"}