{"schema_version": "1.7.0", "id": "RLSA-2026:9345", "modified": "2026-04-23T12:08:59.131903Z", "published": "2026-04-23T12:01:08.671870Z", "upstream": ["CVE-2026-33416", "CVE-2026-33636", "CVE-2026-5731", "CVE-2026-5732", "CVE-2026-5734"], "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.", "severity": [{"type": "CVSS_V3", "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"}], "affected": [{"package": {"ecosystem": "Rocky Linux:8", "name": "thunderbird", "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"}}]}], "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"}], "credits": [{"name": "Rocky Enterprise Software Foundation"}, {"name": "Red Hat"}]}