CVE-2026-87766
highA flaw was found in bubblewrap.
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
8.8
8.8 (CVSS v3.1)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H Severity source: NVD CVSS v3.1 (secalert@redhat.com)
Timeline (UTC)
Published: 2026-09-09 09:17
Modified: 2026-10-20 00:19
NVD status: Awaiting Analysis
Last synced 1 day ago
Verified against the source API 2026-10-27 06:52 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://access.redhat.com/errata/RHSA-2026:85306 secalert@redhat.com
- https://access.redhat.com/errata/RHSA-2026:85308 secalert@redhat.com
- https://access.redhat.com/errata/RHSA-2026:85309 secalert@redhat.com
- https://access.redhat.com/errata/RHSA-2026:85312 secalert@redhat.com
- https://access.redhat.com/errata/RHSA-2026:85313 secalert@redhat.com
- https://access.redhat.com/errata/RHSA-2026:85317 secalert@redhat.com
- https://access.redhat.com/errata/RHSA-2026:85319 secalert@redhat.com
- https://access.redhat.com/errata/RHSA-2026:85322 secalert@redhat.com
- https://access.redhat.com/errata/RHSA-2026:85324 secalert@redhat.com
- https://access.redhat.com/errata/RHSA-2026:85325 secalert@redhat.com
- https://access.redhat.com/security/cve/CVE-2026-87766 secalert@redhat.com
- https://bugs.debian.org/1145655 secalert@redhat.com
- https://bugzilla.redhat.com/show_bug.cgi?id=2530542 secalert@redhat.com
- https://github.com/containers/bubblewrap/releases/tag/v0.12.0 secalert@redhat.com
- https://github.com/containers/bubblewrap/security/advisories/GHSA-pxhw-h44j-8pfx secalert@redhat.com
- https://www.openwall.com/lists/oss-security/2026/08/27/7 secalert@redhat.com
- http://www.openwall.com/lists/oss-security/2026/09/09/3 af854a3a-2127-422b-91ae-364da2661108
- http://www.openwall.com/lists/oss-security/2026/09/22/23 af854a3a-2127-422b-91ae-364da2661108
Data sources
NVD CVE API 2.0 — fetched 2026-10-27 06:52 UTC · record ↗