CVE-2026-1265: 
IBM InfoSphere Information Server vulnerability analysis and mitigation

CVE-2026-1265 is an information disclosure vulnerability in IBM InfoSphere Information Server caused by the insertion of sensitive information into log files (CWE-532). It affects IBM InfoSphere Information Server versions 11.7.0.0 through 11.7.1.6. The vulnerability was published on March 3, 2026, with a patch made available shortly after. It carries a CVSS v3.1 base score of 5.3 (Medium) (IBM Advisory, Red Hat CVE).

The root cause is classified as CWE-532 (Insertion of Sensitive Information into Log File), where the application writes sensitive data — such as credentials, tokens, or other confidential application data — to log files during normal operations. The attack vector is network-based with low attack complexity and requires no user interaction, though exploitation is associated with authenticated low-privilege access. An attacker or any user with access to the log files could read the sensitive information written there, potentially enabling further compromise (IBM Advisory, Feedly).

Successful exploitation results in a low confidentiality impact — sensitive information such as credentials, tokens, or other application data may be exposed to users who have access to log files. There is no integrity or availability impact. If exposed credentials or tokens are leveraged, an attacker could potentially escalate privileges or move laterally within the environment (IBM Advisory, Red Hat CVE).

There is no public proof-of-concept exploit available, and no evidence of active in-the-wild exploitation has been observed. The EPSS score is approximately 0.025% (0.000250), indicating a very low probability of exploitation in the near term. The vulnerability is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog. A patch is available from IBM (IBM Advisory).

IBM has released a patch addressing this vulnerability; organizations should update IBM InfoSphere Information Server to a version newer than 11.7.1.6. As interim measures, administrators should restrict access to log files to only authorized personnel, implement log monitoring and alerting for sensitive data patterns, and consider deploying log redaction mechanisms to prevent sensitive information from being written to logs. Refer to the IBM support page for patch details and deployment instructions (IBM Advisory).