An update for flatpak is now available for openEuler-24.03-LTS-SP4 Security Advisory openeuler-security@openeuler.org openEuler security committee openEuler-SA-2026-4571 Final 1.0 1.0 2026-10-29 Initial 2026-10-29 2026-10-29 openEuler SA Tool V1.0 2026-10-29 flatpak security update An update for flatpak is now available for openEuler-24.03-LTS-SP4 flatpak is a system for building, distributing and running sandboxed desktop applications on Linux. See https://wiki.gnome.org/Projects/SandboxedApps for more information. Security Fix(es): In Flatpak before 1.18.1, the revokefs writer, used by the flatpak-system-helper to receive repository data from unprivileged callers, validated file paths by rejecting literal .. components but did not prevent symlink traversal. A malicious local user in an active local session could obtain two revokefs sessions via the system helper, create a symlink in one session pointing into the other session's directory, and retain a file descriptor through that symlink. This allowed the attacker to modify files belonging to a different revokefs session after they had been validated and imported by the system helper. In particular, an attacker could use this to tamper with ostree commit objects in the system repository after they passed signature verification, enabling root-controlled file writes to attacker-chosen paths and local root privilege escalation.(CVE-2026-96808) An update for flatpak is now available for master/openEuler-22.03-LTS-SP4/openEuler-24.03-LTS-Next/openEuler-24.03-LTS-SP1/openEuler-24.03-LTS-SP3/openEuler-24.03-LTS-SP4. openEuler Security has rated this update as having a security impact of high. A Common Vunlnerability Scoring System(CVSS)base score,which gives a detailed severity rating, is available for each vulnerability from the CVElink(s) in the References section. High flatpak https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4571 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-96808 https://nvd.nist.gov/vuln/detail/CVE-2026-96808 openEuler-24.03-LTS-SP4 flatpak-1.10.2-16.oe2403sp4.aarch64.rpm flatpak-debuginfo-1.10.2-16.oe2403sp4.aarch64.rpm flatpak-debugsource-1.10.2-16.oe2403sp4.aarch64.rpm flatpak-devel-1.10.2-16.oe2403sp4.aarch64.rpm flatpak-1.10.2-16.oe2403sp4.src.rpm flatpak-1.10.2-16.oe2403sp4.x86_64.rpm flatpak-debuginfo-1.10.2-16.oe2403sp4.x86_64.rpm flatpak-debugsource-1.10.2-16.oe2403sp4.x86_64.rpm flatpak-devel-1.10.2-16.oe2403sp4.x86_64.rpm flatpak-help-1.10.2-16.oe2403sp4.noarch.rpm In Flatpak before 1.18.1, the revokefs writer, used by the flatpak-system-helper to receive repository data from unprivileged callers, validated file paths by rejecting literal .. components but did not prevent symlink traversal. A malicious local user in an active local session could obtain two revokefs sessions via the system helper, create a symlink in one session pointing into the other session's directory, and retain a file descriptor through that symlink. This allowed the attacker to modify files belonging to a different revokefs session after they had been validated and imported by the system helper. In particular, an attacker could use this to tamper with ostree commit objects in the system repository after they passed signature verification, enabling root-controlled file writes to attacker-chosen paths and local root privilege escalation. 2026-10-29 CVE-2026-96808 openEuler-24.03-LTS-SP4 High 7.4 AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H flatpak security update 2026-10-29 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4571