Link Following Affecting bubblewrap package, versions <0:0.4.1-7.el9_4.1


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.17% (6th percentile)

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  • Snyk IDSNYK-RHEL9-BUBBLEWRAP-21280574
  • published20 Oct 2026
  • disclosed9 Sept 2026

Introduced: 9 Sep 2026

CVE-2026-87766  (opens in a new tab)
CWE-59  (opens in a new tab)

How to fix?

Upgrade RHEL:9 bubblewrap to version 0:0.4.1-7.el9_4.1 or higher.
This issue was patched in RHSA-2026:85319.

NVD Description

Note: Versions mentioned in the description apply only to the upstream bubblewrap package and not the bubblewrap package as distributed by RHEL. See How to fix? for RHEL:9 relevant fixed versions and status.

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 Base Scores

version 3.1