CARGO · JUNE 2026 · EARLY WARNING

Mise Package Vulnerability: Arbitrary Code Execution via Tera Templates

EARLY WARNING · UNCONFIRMED. This page describes a developing threat that 0Day surfaced from early signals and has not yet independently confirmed. Details may change. Always verify against the primary sources before acting.

GHSA-FJJ5-V948-WHJJSeverity: HIGH

An early warning has been issued regarding a potential vulnerability in the Mise package that could allow arbitrary code execution via Tera templates in.tool-versions files, affecting various versions.

What happened

Reportedly, the Mise package is vulnerable to arbitrary code execution through Tera templates in.tool-versions files. This vulnerability appears to enable attackers to bypass trust verification when Mise is operating in non-paranoid mode. The issue is under investigation with the tracked ID GHSA-FJJ5-V948-WHJJ. Affected versions include those introduced from '2026.3.15' to '2026.6.4', '2026.2.18' to '2026.6.4', '0' to '2026.6.4', '0' to '2026.6.1', and '0' to '2026.3.10'. It is recommended to avoid using .tool-versions files from untrusted repositories or to upgrade to a patched version if available. For more details, consult the primary sources.

How 0Day mitigates this

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