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CVE-2026-87766 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:8.8 HIGHVector:CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
http://www.openwall.com/lists/oss-security/2026/09/09/3	CVE
http://www.openwall.com/lists/oss-security/2026/09/22/23	CVE
https://access.redhat.com/security/cve/CVE-2026-87766	[email protected]
https://bugs.debian.org/1145655	[email protected]
https://bugzilla.redhat.com/show_bug.cgi?id=2530542	[email protected]
https://github.com/containers/bubblewrap/releases/tag/v0.12.0	[email protected]
https://github.com/containers/bubblewrap/security/advisories/GHSA-pxhw-h44j-8pfx	[email protected]
https://www.openwall.com/lists/oss-security/2026/08/27/7	[email protected]

see all 8 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-59	Improper Link Resolution Before File Access ('Link Following')	[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

5 change records found show changes

Date	Action	Recorded By
Sep 22, 2026	CVE Modified	CVE
Sep 9, 2026	CVE Modified	CVE
Sep 9, 2026	CVE Modified	CISA-ADP
Sep 9, 2026	CVE Modified	[email protected]
Sep 9, 2026	New CVE Received	[email protected]