ESB-2026.6632

=========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2026.6632 webkit2gtk3 security update 16 June 2026 =========================================================================== AUSCERT Security Bulletin Summary --------------------------------- Product: webkit2gtk3 Publisher: Red Hat Operating System: Red Hat Resolution: Patch/Upgrade CVE Names: CVE-2026-28958 CVE-2026-28883 CVE-2026-28947 CVE-2026-28942 CVE-2026-43660 CVE-2026-28907 CVE-2026-43658 CVE-2026-28905 CVE-2026-28847 CVE-2026-28904 CVE-2026-28955 CVE-2026-28903 CVE-2026-28953 CVE-2026-28902 CVE-2026-28901 CVE-2026-28946 Original Bulletin: https://access.redhat.com/errata/RHSA-2026:25918 Comment: CVSS (Max): 8.8 CVE-2026-43658 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H) CVSS Source: Red Hat Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H EPSS (Max): 0.2% (37th) CVE-2026-28907 2026-06-14 - --------------------------BEGIN INCLUDED TEXT-------------------- RHSA-2026:25918 - Security Advisory Issued: 2026-06-15 Updated: 2026-06-15 Synopsis Webkit2gtk3 security update Type/Severity Security Advisory: Important Topic An update for webkit2gtk3 is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. Description WebKitGTK is the port of the portable web rendering engine WebKit to the GTK platform. Security Fix(es): o webkitgtk: Processing maliciously crafted web content may lead to an unexpected Safari crash (CVE-2026-28946) o webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash (CVE-2026-28847) o webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash (CVE-2026-28883) o webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash (CVE-2026-28901) o webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash (CVE-2026-28902) o webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash (CVE-2026-28903) o webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash (CVE-2026-28904) o webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash (CVE-2026-28905) o webkitgtk: Processing maliciously crafted web content may prevent Content Security Policy from being enforced (CVE-2026-28907) o webkitgtk: Processing maliciously crafted web content may lead to an unexpected Safari crash (CVE-2026-28942) o webkitgtk: Processing maliciously crafted web content may lead to an unexpected Safari crash (CVE-2026-28947) o webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash (CVE-2026-28953) o webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash (CVE-2026-28955) o webkitgtk: An app may be able to access sensitive user data (CVE-2026-28958) o webkitgtk: Processing maliciously crafted web content may lead to an unexpected Safari crash (CVE-2026-43658) o webkitgtk: Processing maliciously crafted web content may prevent Content Security Policy from being enforced (CVE-2026-43660) For 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. Solution For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Affected Products o Red Hat Enterprise Linux for x86_64 8 x86_64 o Red Hat Enterprise Linux for IBM z Systems 8 s390x o Red Hat Enterprise Linux for Power, little endian 8 ppc64le o Red Hat Enterprise Linux for ARM 64 8 aarch64 o Red Hat Enterprise Linux for x86_64 - Extended Life Cycle 8.10 x86_64 o Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle 8.10 aarch64 o Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle 8.10 ppc64le o Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle 8.10 s390x Fixes o BZ - 2471790 - CVE-2026-28946 webkitgtk: Processing maliciously crafted web content may lead to an unexpected Safari crash o BZ - 2483955 - CVE-2026-28847 webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash o BZ - 2483956 - CVE-2026-28883 webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash o BZ - 2483957 - CVE-2026-28901 webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash o BZ - 2483958 - CVE-2026-28902 webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash o BZ - 2483959 - CVE-2026-28903 webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash o BZ - 2483960 - CVE-2026-28904 webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash o BZ - 2483961 - CVE-2026-28905 webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash o BZ - 2483962 - CVE-2026-28907 webkitgtk: Processing maliciously crafted web content may prevent Content Security Policy from being enforced o BZ - 2483963 - CVE-2026-28942 webkitgtk: Processing maliciously crafted web content may lead to an unexpected Safari crash o BZ - 2483964 - CVE-2026-28947 webkitgtk: Processing maliciously crafted web content may lead to an unexpected Safari crash o BZ - 2483965 - CVE-2026-28953 webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash o BZ - 2483966 - CVE-2026-28955 webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash o BZ - 2483967 - CVE-2026-28958 webkitgtk: An app may be able to access sensitive user data o BZ - 2483968 - CVE-2026-43658 webkitgtk: Processing maliciously crafted web content may lead to an unexpected Safari crash o BZ - 2483969 - CVE-2026-43660 webkitgtk: Processing maliciously crafted web content may prevent Content Security Policy from being enforced CVEs o CVE-2026-28847 o CVE-2026-28883 o CVE-2026-28901 o CVE-2026-28902 o CVE-2026-28903 o CVE-2026-28904 o CVE-2026-28905 o CVE-2026-28907 o CVE-2026-28942 o CVE-2026-28946 o CVE-2026-28947 o CVE-2026-28953 o CVE-2026-28955 o CVE-2026-28958 o CVE-2026-43658 o CVE-2026-43660 References o https://access.redhat.com/security/updates/classification/#important - --------------------------END INCLUDED TEXT---------------------- You have received this e-mail bulletin as a result of your organisation's registration with AUSCERT. 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