CVE-2026-8330 in Community Edition
Summary
by MITRE • 06/25/2026
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 9.3 before 18.11.6, 19.0 before 19.0.3, and 19.1 before 19.1.1 that under certain conditions could have allowed sensitive information to be written to application logs due to insufficient filtering in a CI/CD API endpoint.
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Analysis
by VulDB Data Team • 06/25/2026
This vulnerability resides within GitLab's continuous integration and deployment infrastructure where improper input validation leads to information disclosure through log files. The flaw affects versions prior to specific patch releases including 18.11.6, 19.0.3, and 19.1.1 across both community and enterprise editions. The vulnerability manifests when CI/CD API endpoints process user-supplied data without adequate sanitization measures, allowing sensitive parameters or credentials to be inadvertently logged. This represents a classic case of insufficient input filtering that directly violates security best practices for log management and data protection. The issue falls under CWE-20 Improper Input Validation and aligns with ATT&CK technique T1567.002 Exfiltration Over Web Service where malicious actors could potentially harvest credentials from log files.
The technical implementation of this vulnerability occurs within GitLab's API endpoint handling logic where CI/CD job parameters are processed without proper sanitization before being written to application logs. When users submit pipeline configurations or environment variables through the CI/CD API, the system fails to strip or mask sensitive information such as API keys, tokens, passwords, or other confidential data before logging these values. This creates a scenario where attackers with access to log files could extract valuable credentials and authentication materials that should remain protected. The vulnerability is particularly concerning because it operates silently in the background without alerting administrators to the compromise, making it difficult to detect through normal monitoring procedures.
The operational impact of this vulnerability extends beyond simple credential leakage to encompass broader security implications for development environments. Organizations utilizing GitLab's CI/CD capabilities may unknowingly expose sensitive information that could be leveraged for further attacks including lateral movement within networks, access to additional systems, or exploitation of other vulnerable components. The vulnerability affects the integrity of the logging infrastructure itself, as it undermines the trustworthiness of log data that security teams rely upon for monitoring and incident response activities. This creates a false sense of security where log analysis becomes ineffective due to contamination with sensitive information.
Mitigation strategies should focus on implementing comprehensive input sanitization procedures within all API endpoints that handle CI/CD configurations and environment variables. Organizations must ensure that any user-provided data undergoes proper filtering before being written to application logs, including the implementation of automated credential detection and masking mechanisms. Regular log auditing should be performed to identify and remove any previously compromised sensitive information from existing log files. System administrators should also implement role-based access controls on log files, restricting access to only authorized personnel with legitimate security investigation needs. Additionally, organizations should conduct regular vulnerability assessments targeting their CI/CD infrastructure and establish automated monitoring for suspicious logging patterns that could indicate potential exploitation attempts. The remediation efforts must align with NIST SP 800-53 security controls related to audit logging and information input validation to ensure comprehensive protection against similar vulnerabilities.