CVE-2026-87766
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 sandboxed process starts. This issue is GHSA-pxhw-h44j-8pfx. It is fixed in bubblewrap 0.12.0.
- Score
- CVSS 3.1 8.8 High
- Status
- Awaiting Analysis - secalert@redhat.com
- Published
- 2026-09-09
- Last modified
- 2026-10-20
- Weaknesses
- CWE-59
Affected products
- Enterprise Linux (Redhat)
- Enterprise Linux Eus (Redhat)
- Hummingbird (Redhat)
- Rhel Aus (Redhat)
- Rhel E4s (Redhat)
- Rhel Eus (Redhat)
- Rhel Eus Long Life (Redhat)
- Rhel Tus (Redhat)
References
- https://access.redhat.com/errata/RHSA-2026:85306
- https://access.redhat.com/errata/RHSA-2026:85308
- https://access.redhat.com/errata/RHSA-2026:85309
- https://access.redhat.com/errata/RHSA-2026:85312
- https://access.redhat.com/errata/RHSA-2026:85313
- https://access.redhat.com/errata/RHSA-2026:85317
- https://access.redhat.com/errata/RHSA-2026:85319
- https://access.redhat.com/errata/RHSA-2026:85322
- https://access.redhat.com/errata/RHSA-2026:85324
- https://access.redhat.com/errata/RHSA-2026:85325
- https://access.redhat.com/security/cve/CVE-2026-87766
- https://bugs.debian.org/1145655
- https://bugzilla.redhat.com/show_bug.cgi?id=2530542
- https://github.com/containers/bubblewrap/releases/tag/v0.12.0
- https://github.com/containers/bubblewrap/security/advisories/GHSA-pxhw-h44j-8pfx
- https://www.openwall.com/lists/oss-security/2026/08/27/7
- http://www.openwall.com/lists/oss-security/2026/09/09/3
- http://www.openwall.com/lists/oss-security/2026/09/22/23
