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OpenAdvisories
Critical RHSA-2026:21755 2 CVEs

Red Hat Security Advisory: flatpak security update

Published May 29, 2026 · Updated Jul 6, 2026

Ecosystem: Red Hat

Fixed packages 17

ReleasePackageFixed in
Red Hat · RHEL 9 enterprise_linux:9::appstream flatpak 0:1.12.9-4.el9_8.1
Red Hat · RHEL 9 enterprise_linux:9::appstream flatpak-debuginfo 0:1.12.9-4.el9_8.1
Red Hat · RHEL 9 enterprise_linux:9::appstream flatpak-debugsource 0:1.12.9-4.el9_8.1
Red Hat · RHEL 9 enterprise_linux:9::appstream flatpak-libs 0:1.12.9-4.el9_8.1
Red Hat · RHEL 9 enterprise_linux:9::appstream flatpak-libs-debuginfo 0:1.12.9-4.el9_8.1
Red Hat · RHEL 9 enterprise_linux:9::appstream flatpak-selinux 0:1.12.9-4.el9_8.1
Red Hat · RHEL 9 enterprise_linux:9::appstream flatpak-session-helper 0:1.12.9-4.el9_8.1
Red Hat · RHEL 9 enterprise_linux:9::appstream flatpak-session-helper-debuginfo 0:1.12.9-4.el9_8.1
Red Hat · RHEL 9 enterprise_linux:9::appstream flatpak-tests-debuginfo 0:1.12.9-4.el9_8.1
Red Hat · RHEL 9 enterprise_linux:9::crb flatpak 0:1.12.9-4.el9_8.1
Red Hat · RHEL 9 enterprise_linux:9::crb flatpak-debuginfo 0:1.12.9-4.el9_8.1
Red Hat · RHEL 9 enterprise_linux:9::crb flatpak-debugsource 0:1.12.9-4.el9_8.1
Red Hat · RHEL 9 enterprise_linux:9::crb flatpak-devel 0:1.12.9-4.el9_8.1
Red Hat · RHEL 9 enterprise_linux:9::crb flatpak-libs-debuginfo 0:1.12.9-4.el9_8.1
Red Hat · RHEL 9 enterprise_linux:9::crb flatpak-session-helper 0:1.12.9-4.el9_8.1
Red Hat · RHEL 9 enterprise_linux:9::crb flatpak-session-helper-debuginfo 0:1.12.9-4.el9_8.1
Red Hat · RHEL 9 enterprise_linux:9::crb flatpak-tests-debuginfo 0:1.12.9-4.el9_8.1

Vulnerabilities 2

  • Critical 9.3
    CVE-2026-34078

    Flatpak has a complete sandbox escape leading to host file access and code execution in the host context

    Flatpak is a Linux application sandboxing and distribution framework. Prior to 1.16.4, the Flatpak portal accepts paths in the sandbox-expose options which can be app-controlled symlinks pointing at arbitrary paths. Flatpak run mounts the resolved host path i…

    Flatpak Flatpak flatpak flatpak Debian Ubuntu Alpine
  • High 8.7
    CVE-2026-34079

    Flatpak affected by arbitrary file deletion on the host filesystem

    Flatpak is a Linux application sandboxing and distribution framework. Prior to 1.16.4, the caching for ld.so removes outdated cache files without properly checking that the app controlled path to the outdated cache is in the cache directory. This allows Flatp…

    Flatpak Flatpak flatpak flatpak Debian Ubuntu Alpine

References

  • article
    https://access.redhat.com/security/updates/classification/#important
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2456276
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2456284
  • advisory
    https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_21755.json
  • report
    https://access.redhat.com/security/cve/CVE-2026-34078
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-34078
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-34078
  • article
    https://github.com/flatpak/flatpak/security/advisories/GHSA-cc2q-qc34-jprg
  • report
    https://access.redhat.com/security/cve/CVE-2026-34079
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-34079
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-34079
  • article
    https://github.com/flatpak/flatpak/security/advisories/GHSA-p29x-r292-46pp