CVE-2026-87766: Improper Link Resolution Before File Access ('Link Following') in Red Hat Red Hat Enterprise Linux 10
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.
CVE-2026-87766: Improper Link Resolution Before File Access ('Link Following') in Red Hat Red Hat Enterprise Linux 10
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.
CVSS v3.1
Score 8.8high
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- redhat
- Date Reserved
- 2026-09-09T08:08:33.568Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://access.redhat.com/security/cve/CVE-2026-87766","vendor":"Red Hat"}]
Threat ID: 6aa11e60acd9273b490becae
Added to database: 09/09/2026, 08:52:48 UTC
Last updated: 09/09/2026, 08:52:48 UTC
Views: 1
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