Cyber Resilience

CVE-2026-41163

HighUpdated

Published: 09 May 2026

Published
09 May 2026
Modified
30 June 2026
KEV Added
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Patch
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CVSS Score v4 8.7 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:X/V:X/RE:X/U:X
EPSS Score 0.0027 19.2th percentile
Risk Priority 55 floored blend · peak EPSS

Summary

CVE-2026-41163 is a high-severity Improper Privilege Management (CWE-269) vulnerability. Its CVSS base score is 8.7 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Ptrace System Calls (T1055.008); ranked at the 19.2th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

OWASP Top 10 for Web (2025)

A06:2025 Insecure Design

EU & UK References

Vulnerability details

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…

more

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.

CWE(s)
CWE-269

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1055.008 Ptrace System Calls Stealth
Adversaries may inject malicious code into processes via ptrace (process trace) system calls in order to evade process-based defenses as well as possibly elevate privileges.
attack.mitre.org →
T1068 Exploitation for Privilege Escalation Privilege Escalation
Adversaries may exploit software vulnerabilities in an attempt to elevate privileges.
attack.mitre.org →
T1548.001 Setuid and Setgid Privilege Escalation
An adversary may abuse configurations where an application has the setuid or setgid bits set in order to get code running in a different (and possibly more privileged) user’s context.
attack.mitre.org →
Why these techniques?

Vulnerability enables ptrace attachment to setuid bubblewrap process to hijack privileged operations (overlay mounts) for privilege escalation.

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0

Affected Assets

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From
inferred from references and description; NVD did not file a CPE for this CVE

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

AC-1 Policy and Procedures
addresses: CWE-269

Policy addresses roles, responsibilities, and privilege management to prevent improper privilege assignments.

AC-13 Supervision and Review — Access Control
addresses: CWE-269

Access supervision ensures privileges are assigned and managed without improper escalation or retention.

AC-2 Account Management
addresses: CWE-269

Assigning group/role memberships and access authorizations (privileges) while reviewing accounts addresses improper privilege management.

AC-25 Reference Monitor
addresses: CWE-269

Enforces proper privilege management by requiring all decisions through the verified reference monitor.

AC-5 Separation of Duties
addresses: CWE-269

By mandating division of duties across roles, the control enforces proper privilege management and prevents a single entity from controlling an entire sensitive process.

AC-6 Least Privilege
addresses: CWE-269

Implements core proper privilege management by restricting to only required rights.

AT-1 Policy and Procedures
addresses: CWE-269

Policy requires training on privilege management and least privilege, making it harder to exploit improper privilege management weaknesses.

AT-3 Role-based Training
addresses: CWE-269

Training covers proper privilege management practices, making incorrect privilege assignments less likely.

References