CVE-2026-33646 json
mise: Arbitrary Code Execution via Tera Templates in .tool-versions Files (Trust Bypass)
published 2026-06-22 4 mo ago modified 2026-10-25 14 d ago also EUVD-2026-39816 , GHSA-fjj5-v948-whjj
- cvss
- 9.6
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 40%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- crates.io mise 2026.3.10
- jdx mise 2026.3.10
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- total
- Assessed
- 4 mo ago
Exploit prediction
0.46% chance of exploitation in the next 30 days, higher than 40% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/jdx/mise/security/advisories/GHSA-fjj5-v948-whjj referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H |
| GitHub | 3.1 | 9.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| crates.io | mise | <2026.3.10 |
2026.3.10 |
Affected products
- jdx mise
Classification
- Weakness
-
- CWE-94 Improper Control of Generation of Code
References
-
github.com
/jdx/mise/security/advisories/GHSA-fjj5-v948-whjj
exploit, web
-
nvd.nist.gov
/vuln/detail/CVE-2026-33646
advisory
-
github.com
/jdx/mise
package
Sources
- CVE List CVE-2026-33646
- GitHub Advisory GHSA-fjj5-v948-whjj
- NVD CVE-2026-33646
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.