CVE-2026-41163

Local privilege escalation via ptraceable setup process

Published May 9, 2026 · Updated May 9, 2026

Privilege escalation in Containers Bubblewrap 0.11.0 through 0.11.1 allows local users to invoke privileged mount operations via ptrace. In setuid mode, drop_privs marks the low-privileged setup process dumpable after dropping capabilities, so a same-user tracer can control requests sent to the privileged parent. Setuid installation is required; successful exploitation permits otherwise-forbidden overlay mounts on the Linux host.

CVSS severity8.7
High
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Privilege escalation in Containers Bubblewrap 0.11.0 through 0.11.1 allows local users to invoke privileged mount operations via ptrace. In setuid mode, drop_privs marks the low-privileged setup process dumpable after dropping capabilities, so a same-user tracer can control requests sent to the privileged parent. Setuid installation is required; successful exploitation permits otherwise-forbidden overlay mounts on the Linux host.

The record

CVE
CVE-2026-41163
Published
May 9, 2026
Updated
May 9, 2026
Vendor
Containers
Product
Bubblewrap
Classifications
CWE-269, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 9, 2026CVE publishedPublication date reported by the CVE source.
  2. May 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 0.11.0, < 0.11.2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Containers · Bubblewrapversion=>= 0.11.0, < 0.11.2

Published CVSS scores

8.7GitHub, Inc.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
7.0Red HatCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-269Improper Privilege Management
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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