CVE-2026-54727: proot-distro has a Container Isolation Bypass via Crafted Restore Archive

Severity: high (CVSS 8.2 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-07-29 · updated 2026-10-24
Weakness: CWE-668

Description

proot-distro is a utility for managing proot containers. Prior to version 5.1.6, proot-distro restore accepted hardlink entries whose linkname referenced another installed container and did not verify that the hardlink source container matched the destination container being restored, allowing a crafted restore archive to copy files between otherwise isolated containers. This issue is fixed in version 5.1.6.

Affected products

termux proot-distro: before 5.1.6

References

https://github.com/termux/proot-distro/commit/98aff324b7d8500ff75a8ca9ac087ee636be4716
https://github.com/termux/proot-distro/releases/tag/v5.1.6
https://github.com/termux/proot-distro/security/advisories/GHSA-7h3g-4w2f-fj2f
https://github.com/termux/proot-distro/security/advisories/GHSA-7h3g-4w2f-fj2f

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