Red Hat Security Advisory: bubblewrap security update

Fixed packages 3

Vulnerabilities 1

• High 8.8
  CVE-2026-87766

  Bubblewrap: bubblewrap: symlink traversal via /oldroot allows writing files outside sandbox during setup

  A flaw was found in bubblewrap. During sandbox setup, creating files or directories under the new root can follow a parent symlink onto the host via /oldroot, writing attacker-chosen paths outside the sandbox as the launching user. This happens before the san…

  Red Hat Red Hat Enterprise Linux 9 Red Hat Enterprise Linux 8 Red Hat Enterprise Linux 10 Linux Debian Ubuntu Azure Linux
  Sep 9, 2026

References

• article
  https://access.redhat.com/security/updates/classification/#important
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2530542
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_85308.json
• report
  https://access.redhat.com/security/cve/CVE-2026-87766
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-87766
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-87766
• article
  https://bugs.debian.org/1145655
• article
  https://github.com/containers/bubblewrap/releases/tag/v0.12.0
• article
  https://github.com/containers/bubblewrap/security/advisories/GHSA-pxhw-h44j-8pfx
• article
  https://www.openwall.com/lists/oss-security/2026/08/27/7