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Vulnerability record · CVE-2026-41163 · published 9 May 2026

CVE-2026-41163: Improper privilege management vulnerability

bubblewrap is a low-level unprivileged sandboxing tool. From version 0.11.0 to before version 0.11.2, if bubblewrap is installed in setuid mode then the user can use ptrace to attach to bubblewrap and control the unprivileged part of the sandbox setup phase. This allows the attacker to arbitrarily use the privileged operations, and in particular the "overlay mount" operation, allowing the creation of overlay mounts which is otherwise not allowed in the setuid version of bubblewrap. This issue has been patched in version 0.11.2.

8.7 CVSS 4.0 High EPSS 0.36% · top 72.7% CWE-269 · Improper privilege management Deferred
8.7CVSS 4.0 base score
0.36%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
5References
24 Aug 2026Last modified by NVD

Description

bubblewrap is a low-level unprivileged sandboxing tool. From version 0.11.0 to before version 0.11.2, if bubblewrap is installed in setuid mode then the user can use ptrace to attach to bubblewrap and control the unprivileged part of the sandbox setup phase. This allows the attacker to arbitrarily use the privileged operations, and in particular the "overlay mount" operation, allowing the creation of overlay mounts which is otherwise not allowed in the setuid version of bubblewrap. This issue has been patched in version 0.11.2.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://github.com/containers/bubblewrap/releases/tag/v0.11.2
https://github.com/containers/bubblewrap/security/advisories/GHSA-xq78-7hw4-5jvp
https://access.redhat.com/security/cve/CVE-2026-41163
https://bugzilla.redhat.com/show_bug.cgi?id=2468439
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-41163.json

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Source: NIST National Vulnerability Database (record CVE-2026-41163), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.