The vulnerability identified as CVE-2026-25918 affects the unity-cli command line utility developed by RageAgainstThePixel, used for managing Unity Game Engine projects. Specifically, versions prior to 1.8.2 contain a flaw in the sign-package command when executed with the --verbose flag. In this mode, the utility logs command-line arguments including sensitive credentials such as --email and --password in plaintext by serializing them with JSON.stringify without any sanitization or redaction. This results in sensitive information being recorded in various locations such as shell history files, continuous integration/continuous deployment (CI/CD) pipeline logs, and centralized log aggregation systems. The vulnerability is classified under CWE-532, which concerns the insertion of sensitive information into log files. The CVSS 4.0 base score is 5.9 (medium severity), reflecting that the attack vector is local (AV:L), requires low attack complexity (AC:L), no privileges (PR:N), no user interaction (UI:N), but partial attack type (AT:P) and high impact on confidentiality (VC:H). There is no impact on integrity or availability. The flaw does not require authentication but does require the attacker to have local access and to trigger the verbose logging. Although no known exploits are reported in the wild, the exposure of credentials in logs can lead to credential theft and subsequent unauthorized access to Unity project resources or associated services. The issue is resolved in version 1.8.2 of unity-cli by presumably sanitizing or omitting sensitive data from logs.

For European organizations, especially those involved in game development or using Unity-based pipelines, this vulnerability poses a risk of credential leakage. If an attacker gains local access to developer machines, build servers, or CI/CD environments where unity-cli is used with verbose logging enabled, they could extract sensitive credentials from logs. This could lead to unauthorized access to Unity accounts, project repositories, or cloud services tied to these credentials, potentially resulting in intellectual property theft, project sabotage, or further lateral movement within the network. The exposure in CI/CD logs is particularly concerning as these logs may be stored for extended periods and accessible to multiple personnel or systems, increasing the attack surface. The impact is primarily on confidentiality, with no direct effect on system integrity or availability. Organizations with strict data protection regulations, such as GDPR, must consider the risk of sensitive data exposure and potential compliance violations.

European organizations should immediately upgrade unity-cli to version 1.8.2 or later to ensure the vulnerability is patched. Until the upgrade is applied, avoid using the --verbose flag with the sign-package command, especially in production or CI/CD environments. Review and sanitize existing logs to remove any sensitive credentials that may have been recorded. Implement strict access controls on log files and CI/CD systems to limit exposure. Additionally, consider using environment variables or secure vaults for credential management instead of passing sensitive data via command-line arguments. Conduct regular audits of logging practices to ensure sensitive information is not inadvertently exposed. Educate developers and DevOps teams about the risks of verbose logging and secure handling of credentials. Finally, monitor for any unauthorized access attempts that could indicate exploitation of leaked credentials.