Advisoriesby IbisRed HatCVE-2026-87766
Red Hat bubblewrap. During sandbox setup: link following
No fix yet
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 versions
| Package | Affected | Fixed in |
|---|---|---|
| Red Hat Enterprise Linux 10 Product | all versions | No fix yet |
| Red Hat Enterprise Linux 8 Product | all versions | No fix yet |
| Red Hat Enterprise Linux 9 Product | all versions | No fix yet |
| Red Hat Hardened Images Product | all versions | No fix yet |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-59
- www.cve.org/CVERecord?id=CVE-2026-87766
- nvd.nist.gov/vuln/detail/CVE-2026-87766
- access.redhat.com/security/cve/CVE-2026-87766
- bugs.debian.org/1145655
- bugzilla.redhat.com/show_bug.cgi?id=2530542
- github.com/containers/bubblewrap/releases/tag/v0.12.0
- github.com/containers/bubblewrap/security/advisories/GHSA-pxhw-h44j-8pfx
- www.openwall.com/lists/oss-security/2026/08/27/7
- www.openwall.com/lists/oss-security/2026/09/09/3
- www.openwall.com/lists/oss-security/2026/09/22/23