RHSA-2026:85319HighCVSS 8.8

Red Hat Security Advisory: bubblewrap security update

Published
October 19, 2026
Last Modified
October 19, 2026

🔗 CVE IDs covered (1)

CVE-2026-87766 →

📋 Description

CVE-2026-87766 — bubblewrap: bubblewrap: symlink traversal via /oldroot allows writing files outside sandbox during setup

🎯 Affected products14

  • Red Hat Enterprise Linux BaseOS E4S (v.9.4)
  • bubblewrap-0:0.4.1-7.el9_4.1.aarch64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.4)
  • bubblewrap-0:0.4.1-7.el9_4.1.ppc64le as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.4)
  • bubblewrap-0:0.4.1-7.el9_4.1.s390x as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.4)
  • bubblewrap-0:0.4.1-7.el9_4.1.src as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.4)
  • bubblewrap-0:0.4.1-7.el9_4.1.x86_64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.4)
  • bubblewrap-debuginfo-0:0.4.1-7.el9_4.1.aarch64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.4)
  • bubblewrap-debuginfo-0:0.4.1-7.el9_4.1.ppc64le as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.4)
  • bubblewrap-debuginfo-0:0.4.1-7.el9_4.1.s390x as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.4)
  • bubblewrap-debuginfo-0:0.4.1-7.el9_4.1.x86_64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.4)
  • bubblewrap-debugsource-0:0.4.1-7.el9_4.1.aarch64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.4)
  • bubblewrap-debugsource-0:0.4.1-7.el9_4.1.ppc64le as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.4)
  • bubblewrap-debugsource-0:0.4.1-7.el9_4.1.s390x as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.4)
  • bubblewrap-debugsource-0:0.4.1-7.el9_4.1.x86_64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.4)

✅ Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Workaround: Do not create files on untrusted content with unpatched bwrap. Do not install untrusted Flatpaks. No upstream fix for older setuid builds.

🔗 References (4)