RHSA-2026:89733 — Security Advisory
Red Hat Security Advisory: flatpak security update
Severity
ImportantRed Hat Product Security
Products
Official CSAF product identity
Published · October 26, 2026
Updated · November 2, 2026
Topic
An update for flatpak is now available for Red Hat Enterprise Linux 9.6 Extended Update Support.
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
Flatpak is a system for building, distributing, and running sandboxed desktop applications on Linux.
Security Fix(es):
-
flatpak: Flatpak: Arbitrary code execution via missing symlink protection (CVE-2026-90616)
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flatpak: flatpak: Arbitrary write access as root via extra-data extraction (CVE-2026-96275)
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flatpak: flatpak: Buffer overflow in OCI delta stream path names on 32-bit systems (CVE-2026-96280)
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flatpak: Flatpak: Local privilege escalation via symlink traversal in revokefs writer (CVE-2026-96808)
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.