Symlink Vulnerability in Bubblewrap by Container Solutions
CVE-2026-87766

8.8HIGH

Key Information:

Vendor

Red Hat
Status
Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 10.0 Extended Update Support
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
Vendor
CVE Published:
9 September 2026

What is CVE-2026-87766?

A vulnerability exists in Bubblewrap that allows for unauthorized file creation outside of its sandbox environment. During the setup of a sandbox, the application improperly handles symlinks, allowing attackers to escape the sandbox and write to arbitrary file paths on the host system. This security flaw occurs before the sandboxed process begins execution, raising significant concerns regarding the integrity and security of applications relying on Bubblewrap for isolation. The issue has been documented under GHSA-pxhw-h44j-8pfx and was resolved in version 0.12.0.

Affected Version(s)

Red Hat Enterprise Linux 10 0:0.10.0-5.el10_2

Red Hat Enterprise Linux 10.0 Extended Update Support 0:0.10.0-3.el10_0.4

Red Hat Enterprise Linux 8 0:0.4.0-3.el8_10

References

https://access.redhat.com/errata/RHSA-2026:85306
vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:85308
vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:85309
vendor-advisoryx_refsource_REDHAT

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Red Hat would like to thank geeknik for reporting this issue.
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