Vulnerability in Red Hat Enterprise Linux 10
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.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.
Affected products
Weakness classification (CWE)
References
- secalert@redhat.com (x_refsource_REDHAT, vdb-entry)
- secalert@redhat.com
- secalert@redhat.com (x_refsource_REDHAT, issue-tracking)
- secalert@redhat.com
- secalert@redhat.com
- secalert@redhat.com
Frequently asked questions
- What is CVE-2026-87766?
- CVE-2026-87766 is a high-severity vulnerability in Red Hat Enterprise Linux 10, classified under Improper Link Resolution Before File Access. CVSS score: 8.8/10. Published 2026-09-09.
- How severe is CVE-2026-87766?
- High severity. CVSS v3 base score is 8.8 out of 10.