CVE-2026-71477: mise: Incorrect file ownership, when installed by the root user using `install.sh`

Severity: medium (CVSS 6.7 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-18 · updated 2026-10-22
Weakness: CWE-278

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.

Affected products

jdx mise: before 2026.7.1

References

https://github.com/jdx/mise/commit/b65dd674d75d9aa5c038b58a3a0cdb522cf258d5
https://github.com/jdx/mise/commit/f1c28906f17af74430ff96f4438733c4a842c88d
https://github.com/jdx/mise/pull/10808
https://github.com/jdx/mise/pull/10819
https://github.com/jdx/mise/releases/tag/v2026.7.1
https://github.com/jdx/mise/security/advisories/GHSA-9mm4-fgvc-x7rp
https://github.com/jdx/mise/security/advisories/GHSA-9mm4-fgvc-x7rp

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