AlmaLinux alert ALSA-2026:21756 (flatpak)

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[Announce]  [Security Advisory] ALSA-2026:21756: flatpak security update (Important)
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Thu, 28 May 2026 21:05:52 +0000
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<0100019e70686f4e-2f90adb1-e8f9-413a-b111-a4e51e13403e-000000@email.amazonses.com>
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Article
Hi,

You are receiving an AlmaLinux Security update email because you subscribed to receive errata
notifications from AlmaLinux.

AlmaLinux: 8
Type: Security
Severity: Important
Release date: 2026-05-28

Summary:

Flatpak is a system for building, distributing, and running sandboxed desktop applications on
Linux.  

Security Fix(es):  

  * flatpak: Flatpak: Arbitrary code execution via crafted symlinks in sandbox-expose options
(CVE-2026-34078)
  * flatpak: Flatpak: Arbitrary file deletion on host via improper cache file path validation
(CVE-2026-34079)


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.


Full details, updated packages, references, and other related information:
https://errata.almalinux.org/8/ALSA-2026-21756.html

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AlmaLinux Team
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