Vulnerability DatabaseCVE-2026-87766
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CVE-2026-87766
Published:September 09, 2026
Updated:September 22, 2026
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.
Affected Packages
https://github.com/containers/bubblewrap.git (GITHUB):
Affected version(s) =0.1.2 <v0.12.0
Fix Suggestion:
Update to version v0.12.0
Related Resources (7)
https://access.redhat.com/security/cve/CVE-2026-87766
https://github.com/containers/bubblewrap/releases/tag/v0.12.0
http://www.openwall.com/lists/oss-security/2026/09/09/3
https://bugzilla.redhat.com/show_bug.cgi?id=2530542
https://bugs.debian.org/1145655
https://github.com/containers/bubblewrap/security/advisories/GHSA-pxhw-h44j-8pfx
https://www.openwall.com/lists/oss-security/2026/08/27/7
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CVSS v4
Base Score:
9.3
Attack Vector
LOCAL
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
HIGH
Subsequent System Integrity
HIGH
Subsequent System Availability
HIGH
CVSS v3
Base Score:
8.8
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Improper Link Resolution Before File Access ('Link Following')
CWE-59
EPSS
Base Score:
0.14