CVE-2026-0519: Secure Access Information Disclosure Flaw

CVE-2026-0519 Overview

CVE-2026-0519 is an Information Leakage vulnerability affecting Absolute Secure Access versions 12.70 and prior to 14.20. The logging subsystem may write unredacted authentication tokens to logs under certain configurations, allowing any party with access to those logs to read and reuse the token to access integrated systems.

Critical Impact

Authentication tokens written to log files in plaintext can be harvested by attackers with log access, enabling unauthorized access to integrated systems without requiring additional authentication.

Affected Products

• Absolute Secure Access version 12.70
• Absolute Secure Access versions prior to 14.20

Discovery Timeline

• 2026-01-17 - CVE CVE-2026-0519 published to NVD
• 2026-01-20 - Last updated in NVD database

Technical Details for CVE-2026-0519

Vulnerability Analysis

This vulnerability falls under CWE-532 (Insertion of Sensitive Information into Log File), a common weakness where applications inadvertently log sensitive data that should remain confidential. In the case of Absolute Secure Access, the logging subsystem fails to properly redact authentication tokens before writing them to log files under specific configuration scenarios.

The exposure requires local access to the affected system and elevated privileges to read log files. While the attack complexity is low once access is obtained, the scope is limited to confidentiality and integrity impacts on the local system. The vulnerability does not directly affect system availability.

Root Cause

The root cause stems from insufficient input sanitization in the logging subsystem. When authentication events occur under certain configurations, the logging mechanism captures the full authentication token without applying the expected redaction filters. This results in plaintext credentials being persisted in log files, violating the principle of least privilege for sensitive data handling.

Attack Vector

Exploitation requires local access to the system where Absolute Secure Access is installed. An attacker with elevated privileges who can read application log files could extract unredacted authentication tokens. These tokens could then be replayed to gain unauthorized access to integrated systems that trust the compromised tokens.

The attack scenario typically involves:

1. An attacker gains local access to a system running vulnerable Secure Access versions
2. The attacker locates and reads the application log files containing authentication events
3. Unredacted tokens are extracted from the log entries
4. The attacker replays these tokens against integrated systems to gain unauthorized access

Detection Methods for CVE-2026-0519

Indicators of Compromise

• Unusual access patterns to Secure Access log file directories
• Multiple failed or successful authentication attempts from unexpected sources using the same token
• Log file access by unauthorized users or processes
• Anomalous authentication activity from integrated systems that accept Secure Access tokens

Detection Strategies

• Monitor file access events for Secure Access log directories using endpoint detection tools
• Implement SIEM rules to detect token reuse patterns across integrated systems
• Enable audit logging for privileged file access operations on application log paths
• Deploy file integrity monitoring on sensitive log directories

Monitoring Recommendations

• Configure SentinelOne to monitor for suspicious log file access patterns
• Establish baseline access patterns for log directories and alert on deviations
• Implement centralized log aggregation with access controls to detect unauthorized log access
• Enable detailed auditing of authentication events across integrated systems

How to Mitigate CVE-2026-0519

Immediate Actions Required

• Upgrade Absolute Secure Access to version 14.20 or later
• Review existing log files for exposed authentication tokens and rotate any potentially compromised credentials
• Restrict file system permissions on log directories to minimize access
• Implement log file encryption at rest where feasible

Patch Information

Absolute has addressed this vulnerability in Secure Access version 14.20 and later. Organizations should upgrade to the patched version as soon as possible. For detailed patch information and download links, refer to the Absolute Security Advisory.

Workarounds

• Restrict access to log directories using file system permissions to limit exposure to authorized administrators only
• Implement log rotation with secure deletion to minimize the window of exposure for sensitive data
• Consider disabling verbose logging temporarily until the patch can be applied
• Deploy additional monitoring on log file access to detect potential exploitation attempts

# Example: Restrict log directory permissions (Linux)
chmod 700 /path/to/secureaccess/logs
chown root:root /path/to/secureaccess/logs

# Example: Enable audit logging for log directory access
auditctl -w /path/to/secureaccess/logs -p rwa -k secureaccess_logs