{"id":"RLSA-2026:0924","summary":"Important: thunderbird security update","details":"Mozilla Thunderbird is a standalone mail and newsgroup client.\n\nSecurity Fix(es):\n\n* firefox: Spoofing issue in the Downloads Panel component (CVE-2025-14327)\n\n* firefox: Use-after-free in the JavaScript: GC component (CVE-2026-0885)\n\n* firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.7, Thunderbird ESR 140.7, Firefox 147 and Thunderbird 147 (CVE-2026-0891)\n\n* firefox: Sandbox escape due to incorrect boundary conditions in the Graphics: CanvasWebGL component (CVE-2026-0878)\n\n* firefox: Use-after-free in the IPC component (CVE-2026-0882)\n\n* firefox: Use-after-free in the JavaScript Engine component (CVE-2026-0884)\n\n* firefox: Information disclosure in the Networking component (CVE-2026-0883)\n\n* firefox: Mitigation bypass in the DOM: Security component (CVE-2026-0877)\n\n* firefox: Spoofing issue in the DOM: Copy & Paste and Drag & Drop component (CVE-2026-0890)\n\n* firefox: Clickjacking issue, information disclosure in the PDF Viewer component (CVE-2026-0887)\n\n* firefox: Sandbox escape due to incorrect boundary conditions in the Graphics component (CVE-2026-0879)\n\n* firefox: Sandbox escape due to integer overflow in the Graphics component (CVE-2026-0880)\n\n* firefox: Incorrect boundary conditions in the Graphics component (CVE-2026-0886)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.","modified":"2026-01-22T09:29:59.545004Z","published":"2026-01-22T09:06:38.168110Z","upstream":["CVE-2025-14327","CVE-2026-0877","CVE-2026-0878","CVE-2026-0879","CVE-2026-0880","CVE-2026-0882","CVE-2026-0883","CVE-2026-0884","CVE-2026-0885","CVE-2026-0886","CVE-2026-0887","CVE-2026-0890","CVE-2026-0891"],"references":[{"type":"ADVISORY","url":"https://errata.rockylinux.org/RLSA-2026:0924"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2420507"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2428961"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2428963"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2428965"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2428966"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2428967"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2428968"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2428969"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2428971"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2428972"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2428973"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2428975"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2428978"}],"affected":[{"package":{"name":"thunderbird","ecosystem":"Rocky Linux:9","purl":"pkg:rpm/rocky-linux/thunderbird?distro=rocky-linux-9&epoch=0"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:140.7.0-1.el9_7"}],"database_specific":{"yum_repository":"AppStream"}}],"database_specific":{"source":"https://storage.googleapis.com/resf-osv-data/RLSA-2026:0924.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H"}],"credits":[{"name":"Rocky Enterprise Software Foundation"},{"name":"Red Hat"}]}