CVE-2025-6624 in snyk
Summary
by MITRE • 06/26/2025
Versions of the package snyk before 1.1297.3 are vulnerable to Insertion of Sensitive Information into Log File through local Snyk CLI debug logs. Container Registry credentials provided via environment variables or command line arguments can be exposed when executing Snyk CLI in DEBUG or DEBUG/TRACE mode.
The issue affects the following Snyk commands:
1. When snyk container test or snyk container monitor commands are run against a container registry, with debug mode enabled, the container registry credentials may be written into the local Snyk CLI debug log. This only happens with credentials specified in environment variables (SNYK_REGISTRY_USERNAME and SNYK_REGISTRY_PASSWORD), or in the CLI (--password/-p and --username/-u).
2. When snyk auth command is executed with debug mode enabled AND the log level is set to TRACE, the Snyk access / refresh credential tokens used to connect the CLI to Snyk may be written into the local CLI debug logs.
3. When snyk iac test is executed with a Remote IAC Custom rules bundle, debug mode enabled, AND the log level is set to TRACE, the docker registry token may be written into the local CLI debug logs.
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Analysis
by VulDB Data Team • 06/26/2025
This vulnerability exists in snyk versions prior to 1.1297.3 and represents a critical information exposure flaw that violates fundamental security principles of credential handling and logging practices. The vulnerability stems from insufficient sanitization of sensitive data within debug logging mechanisms, creating potential exposure pathways for authentication credentials and access tokens that should remain protected. According to CWE-532, this manifests as the insertion of sensitive information into log files, which directly compromises the confidentiality and integrity of authentication mechanisms. The flaw specifically targets the snyk cli tool's debug functionality, where verbose logging operations inadvertently capture credential data in plaintext format, creating persistent exposure windows within local filesystems.
The technical implementation of this vulnerability occurs through multiple attack vectors that leverage the snyk cli's debug logging capabilities. When executing container commands with debug mode enabled, the system processes environment variables SNYK_REGISTRY_USERNAME and SNYK_REGISTRY_PASSWORD, along with command line parameters --password and --username, without proper sanitization before writing to log files. Similarly, the snyk auth command when operating in trace mode captures access and refresh tokens used for authentication with snyk's cloud services, while the snyk iac test command with remote custom rules bundles can expose docker registry tokens. These operations occur during normal cli execution flows and require only the activation of debug or trace logging levels, making the vulnerability particularly dangerous as it can be triggered by routine debugging operations.
The operational impact of this vulnerability extends beyond simple credential exposure, creating cascading security risks that align with ATT&CK technique T1563.002 for credential dumping and T1078 for valid accounts. Attackers who gain access to affected systems can extract sensitive information from debug log files, potentially gaining unauthorized access to container registries, cloud infrastructure, and other systems protected by the exposed credentials. The vulnerability affects organizations using snyk for security scanning, container monitoring, and infrastructure as code validation, creating exposure across multiple security domains. The risk is particularly elevated in environments where debug logging is enabled as part of routine operations or troubleshooting procedures, as the credentials may persist in log files for extended periods.
Organizations should immediately implement mitigation strategies focusing on log sanitization and access controls. The primary remediation involves upgrading to snyk version 1.1297.3 or later where the vulnerability has been patched. Additionally, system administrators should disable debug and trace logging in production environments, implement proper log file access controls, and establish monitoring for unauthorized access to debug log files. The vulnerability demonstrates the critical importance of following security best practices for logging operations, particularly regarding sensitive data handling, as outlined in NIST SP 800-92 and ISO/IEC 27001 controls. Organizations should also consider implementing automated log analysis tools to detect potential credential exposure patterns and establish comprehensive incident response procedures for handling such security events.