CVE-2026-1265 Overview
IBM InfoSphere Information Server versions 11.7.0.0 through 11.7.1.6 contain a sensitive information disclosure vulnerability. The application improperly writes sensitive data to log files, potentially exposing confidential information to unauthorized actors who gain access to system logs.
Critical Impact
Sensitive information written to log files can be accessed by attackers with read access to logs, potentially exposing credentials, API keys, session tokens, or other confidential data that should never be logged.
Affected Products
- IBM InfoSphere Information Server 11.7.0.0 through 11.7.1.6
Discovery Timeline
- 2026-03-03 - CVE-2026-1265 published to NVD
- 2026-03-04 - Last updated in NVD database
Technical Details for CVE-2026-1265
Vulnerability Analysis
This vulnerability is classified as CWE-532 (Insertion of Sensitive Information into Log File). IBM InfoSphere Information Server improperly handles sensitive data during logging operations, resulting in confidential information being written to application logs in cleartext or easily recoverable formats.
The vulnerability can be exploited remotely without requiring authentication or user interaction. An attacker who gains access to the log files—whether through a separate vulnerability, misconfigured file permissions, log aggregation systems, or insider access—can extract sensitive information that should have been sanitized or excluded from logging.
Root Cause
The root cause of this vulnerability lies in insufficient input sanitization and improper logging practices within IBM InfoSphere Information Server. The application fails to properly redact or exclude sensitive data fields before writing them to log files. This may include user credentials, authentication tokens, database connection strings, API keys, or other confidential configuration data that passes through the logging subsystem.
Attack Vector
The attack vector is network-based, as the vulnerability exists in a server application accessible over the network. Exploitation requires an attacker to obtain access to the log files containing sensitive information. This could be achieved through:
- Exploiting a separate local file inclusion (LFI) or directory traversal vulnerability
- Gaining unauthorized access to backup systems containing log archives
- Compromising log aggregation or SIEM systems that collect logs from the affected server
- Obtaining read access to the file system through lateral movement or privilege escalation
Once log access is obtained, the attacker can search for and extract sensitive information such as credentials or session tokens that were inadvertently logged.
Detection Methods for CVE-2026-1265
Indicators of Compromise
- Unusual or unauthorized access to log directories on IBM InfoSphere Information Server systems
- Unexpected log file transfers or exfiltration to external destinations
- Evidence of automated log parsing or keyword searches targeting credential patterns
- Access to log files from unexpected user accounts or IP addresses
Detection Strategies
- Monitor file access events on InfoSphere Information Server log directories using file integrity monitoring (FIM) solutions
- Implement audit logging for all access to application log files and directories
- Configure SentinelOne Singularity Platform to detect and alert on suspicious file access patterns targeting log storage locations
- Deploy behavioral detection rules to identify bulk log file reads or transfers
Monitoring Recommendations
- Enable comprehensive audit logging on systems running IBM InfoSphere Information Server
- Monitor for attempts to access /opt/IBM/InformationServer/logs/ or equivalent log directories
- Integrate log access events with SIEM solutions for correlation and alerting
- Regularly review access control lists (ACLs) on log file directories to ensure least-privilege access
How to Mitigate CVE-2026-1265
Immediate Actions Required
- Review IBM InfoSphere Information Server log files for any sensitive information that may have been exposed
- Rotate any credentials, API keys, or tokens that may be present in log files
- Restrict file system permissions on log directories to authorized administrators only
- Apply the security patch provided by IBM as soon as possible
Patch Information
IBM has released a security update to address this vulnerability. Organizations running affected versions (11.7.0.0 through 11.7.1.6) should apply the patch immediately. Detailed patch information and download links are available in the IBM Security Advisory.
Workarounds
- Implement strict file system permissions on log directories to limit access to essential personnel only
- Configure log rotation policies to minimize the retention window of potentially sensitive logs
- Consider deploying a centralized logging solution with proper access controls and encryption at rest
- Audit existing log files for sensitive content and securely delete any logs containing exposed credentials
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
