CVE-2026-71477
Received Received - Intake

Privilege Escalation in mise via Tar Archive Ownership

Publication date: 2026-08-18

Last updated on: 2026-08-18

Assigner: GitHub, Inc.

Description
mise manages dev tools like node, python, cmake, and terraform. Prior to 2026.7.1, release tar archives record mise/bin/mise with user and group ID 1001 and packaging/standalone/install.envsubst extracts and moves it without normalizing ownership, allowing a local user with those IDs to replace a root-installed executable, especially when MISE_INSTALL_PATH targets a shared location such as /usr/local/bin. This issue is fixed in version 2026.7.1.

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Meta Information

Published
2026-08-18
Last Modified
2026-08-18
Generated
2026-09-07
AI Q&A
2026-08-18
EPSS Evaluated
2026-09-06
NVD
CVE-2026-71477
EUVD
EUVD-2026-60974

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
mise mise to 2026.7.1 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-278 A product inherits a set of insecure permissions for an object, e.g. when copying from an archive file, without user awareness or involvement.

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Executive Summary

This vulnerability affects the mise tool, which manages development tools like Node, Python, and Terraform. When installed as root using the provided script, the mise executable and related files are incorrectly assigned ownership to user ID 1001 and group ID 1001 instead of root. This happens because the installer does not normalize ownership during extraction from release archives, which preserve build environment metadata. A local user with UID 1001 could then modify the root-installed mise executable, leading to potential local privilege escalation.

Detection Guidance

Check installed mise binary ownership with 'ls -l $(which mise)' or 'stat /usr/local/bin/mise'. If owned by UID 1001, the system is vulnerable. Review install.sh or MISE_INSTALL_PATH logs for improper ownership during installation.

Impact Analysis

If you installed mise as root using install.sh, especially in shared system directories like /usr/local/bin, a local attacker with UID 1001 could replace the mise executable with malicious code. This could allow them to gain elevated privileges, execute arbitrary commands as root, or compromise system integrity. The impact is higher in multi-user environments where untrusted users have local access.

Compliance Impact

This vulnerability could violate compliance requirements that mandate strict access controls and auditability of system binaries. For GDPR, it may compromise integrity of processing systems. For HIPAA, it could allow unauthorized modification of tools handling protected health information. The incorrect file ownership could also hinder proper audit logging and access control enforcement.

Mitigation Strategies

Upgrade mise to version 2026.7.1 or later. Verify binary ownership is root:root with 'chown 0:0 /usr/local/bin/mise' and permissions 'chmod 755 /usr/local/bin/mise' if needed.

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