CVE-2026-55448: CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') in jdx mise
mise manages dev tools like node, python, cmake, and terraform. From 2026.3.15 until 2026.6.4, mise loads github.credential_command from local project config before any trust decision, then executes that value with sh -c when resolving a GitHub token. An attacker who can place a .mise.toml in a repository can execute arbitrary shell commands when the victim runs a GitHub-related mise command and no higher-priority GitHub token environment variable is set. This vulnerability is fixed in 2026.6.4.
AI Analysis
Technical Summary
The vulnerability arises because mise executes the github.credential_command configuration value from a local project file without proper sanitization or trust verification, leading to OS command injection. This allows an attacker who can place a crafted .mise.toml file in a repository to execute arbitrary shell commands on the victim's machine when the victim runs mise commands related to GitHub authentication, provided no overriding GitHub token environment variable is present. The issue affects mise versions from 2026.3.15 up to but not including 2026.6.4, where the vulnerability was fixed.
Potential Impact
Successful exploitation allows an attacker to execute arbitrary shell commands on the victim's system with the privileges of the user running mise. This can lead to compromise of confidentiality and integrity of the system and data. Availability impact is not indicated. The CVSS v3.1 score is 6.3 (medium severity), reflecting local attack vector, high complexity, no privileges required, user interaction required, and high impact on confidentiality and integrity.
Mitigation Recommendations
A fix is available in mise version 2026.6.4. Users should upgrade to version 2026.6.4 or later to remediate this vulnerability. Until upgraded, avoid running mise GitHub-related commands in untrusted repositories or ensure that a higher-priority GitHub token environment variable is set to prevent execution of the github.credential_command from the local config. Patch status is confirmed fixed in 2026.6.4.
CVE-2026-55448: CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') in jdx mise
Description
mise manages dev tools like node, python, cmake, and terraform. From 2026.3.15 until 2026.6.4, mise loads github.credential_command from local project config before any trust decision, then executes that value with sh -c when resolving a GitHub token. An attacker who can place a .mise.toml in a repository can execute arbitrary shell commands when the victim runs a GitHub-related mise command and no higher-priority GitHub token environment variable is set. This vulnerability is fixed in 2026.6.4.
CVSS v3.1
Score 6.3medium
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability arises because mise executes the github.credential_command configuration value from a local project file without proper sanitization or trust verification, leading to OS command injection. This allows an attacker who can place a crafted .mise.toml file in a repository to execute arbitrary shell commands on the victim's machine when the victim runs mise commands related to GitHub authentication, provided no overriding GitHub token environment variable is present. The issue affects mise versions from 2026.3.15 up to but not including 2026.6.4, where the vulnerability was fixed.
Potential Impact
Successful exploitation allows an attacker to execute arbitrary shell commands on the victim's system with the privileges of the user running mise. This can lead to compromise of confidentiality and integrity of the system and data. Availability impact is not indicated. The CVSS v3.1 score is 6.3 (medium severity), reflecting local attack vector, high complexity, no privileges required, user interaction required, and high impact on confidentiality and integrity.
Mitigation Recommendations
A fix is available in mise version 2026.6.4. Users should upgrade to version 2026.6.4 or later to remediate this vulnerability. Until upgraded, avoid running mise GitHub-related commands in untrusted repositories or ensure that a higher-priority GitHub token environment variable is set to prevent execution of the github.credential_command from the local config. Patch status is confirmed fixed in 2026.6.4.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-06-16T21:59:57.018Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a3eb5316e08203f7dd21fd0
Added to database: 06/26/2026, 17:21:53 UTC
Last enriched: 06/26/2026, 17:37:03 UTC
Last updated: 06/26/2026, 18:33:24 UTC
Views: 4
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