Vulnerability · Published Jun 26, 2026 · Assigned by GitHub_M

CVE-2026-33646mise: Arbitrary Code Execution via Tera Templates in .tool-versions Files (Trust Bypass)

Critical 9.6

In plain English

A critical-severity code injection in mise from jdx. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities).

Severity (CVSS 3.1)9.6Critical

Exploit odds (30 days)0.5%top 59.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

mise manages dev tools like node, python, cmake, and terraform. Prior to 2026.3.10, mise processes .tool-versions files through the Tera template engine during parsing, with the exec() function registered, enabling arbitrary command execution. Unlike .mise.toml files, .tool-versions files are not subject to trust verification in non-paranoid mode. This means an attacker can place a malicious .tool-versions file in a git repository, and when a victim with mise activated cds into the directory, arbitrary commands execute without any trust prompt. This vulnerability is fixed in 2026.3.10.

Affected products (as reported)

Vendor	Product	Versions
jdx	mise	< 2026.3.10

Weakness: CWE-94 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

References

https://github.com/jdx/mise/security/advisories/GHSA-fjj5-v948-whjj x_refsource_CONFIRM