High severity8.8NVD Advisory· Published Sep 9, 2026· Updated Oct 20, 2026
CVE-2026-87766
CVE-2026-87766
Description
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 products
4(expand)+ 1 more
- (no CPE)
- (no CPE)range: >=0.12.0
- osv-coords2 versions
< 0.4.0-3.el8_10+ 1 more
- (no CPE)range: < 0.4.0-3.el8_10
- (no CPE)range: < 1.18.3-1.1
Patches
Vulnerability mechanics
References
18- www.openwall.com/lists/oss-security/2026/09/09/3nvd
- www.openwall.com/lists/oss-security/2026/09/22/23nvd
- access.redhat.com/errata/RHSA-2026:85306nvd
- access.redhat.com/errata/RHSA-2026:85308nvd
- access.redhat.com/errata/RHSA-2026:85309nvd
- access.redhat.com/errata/RHSA-2026:85312nvd
- access.redhat.com/errata/RHSA-2026:85313nvd
- access.redhat.com/errata/RHSA-2026:85317nvd
- access.redhat.com/errata/RHSA-2026:85319nvd
- access.redhat.com/errata/RHSA-2026:85322nvd
- access.redhat.com/errata/RHSA-2026:85324nvd
- access.redhat.com/errata/RHSA-2026:85325nvd
- access.redhat.com/security/cve/CVE-2026-87766nvd
- bugs.debian.org/1145655nvd
- bugzilla.redhat.com/show_bug.cginvd
- github.com/containers/bubblewrap/releases/tag/v0.12.0nvd
- github.com/containers/bubblewrap/security/advisories/GHSA-pxhw-h44j-8pfxnvd
- www.openwall.com/lists/oss-security/2026/08/27/7nvd
News mentions
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