{"id":"RLSA-2026:9345","summary":"Important: thunderbird security update","details":"Mozilla Thunderbird is a standalone mail and newsgroup client.\n\nSecurity Fix(es):\n\n* libpng: libpng: Arbitrary code execution due to use-after-free vulnerability (CVE-2026-33416)\n\n* libpng: libpng: Information disclosure and denial of service via out-of-bounds read/write in Neon palette expansion (CVE-2026-33636)\n\n* thunderbird: firefox: Memory safety bugs fixed in Firefox ESR 140.9.1, Thunderbird ESR 140.9.1, Firefox 149.0.2 and Thunderbird 149.0.2 (CVE-2026-5734)\n\n* thunderbird: firefox: Memory safety bugs fixed in Firefox ESR 115.34.1, Firefox ESR 140.9.1, Thunderbird ESR 140.9.1, Firefox 149.0.2 and Thunderbird 149.0.2 (CVE-2026-5731)\n\n* firefox: thunderbird: Incorrect boundary conditions, integer overflow in the Graphics: Text component (CVE-2026-5732)\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":"2026-04-23T12:30:12.785894Z","published":"2026-04-23T12:01:08.671870Z","upstream":["CVE-2026-33416","CVE-2026-33636","CVE-2026-5731","CVE-2026-5732","CVE-2026-5734"],"references":[{"type":"ADVISORY","url":"https://errata.rockylinux.org/RLSA-2026:9345"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2451805"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2451819"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2455897"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2455901"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2455908"}],"affected":[{"package":{"name":"thunderbird","ecosystem":"Rocky Linux:8","purl":"pkg:rpm/rocky-linux/thunderbird?distro=rocky-linux-8&epoch=0"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:140.9.1-1.el8_10"}],"database_specific":{"yum_repository":"AppStream"}}],"database_specific":{"source":"https://storage.googleapis.com/resf-osv-data/RLSA-2026:9345.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"}],"credits":[{"name":"Rocky Enterprise Software Foundation"},{"name":"Red Hat"}]}