CVE-2026-14350 Overview
CVE-2026-14350 is a log injection vulnerability affecting IBM Cloud Pak for Data System 11.3.0.2 through Interim Fix 001. The flaw stems from improper neutralization of special elements when data is written to log files [CWE-117]. An unauthenticated remote attacker can inject arbitrary content into log messages by sending crafted input to the affected system. This can corrupt log integrity, forge audit trail entries, or embed sequences that disrupt downstream log parsing and monitoring tools.
Critical Impact
Unauthorized attackers can manipulate log content over the network without authentication or user interaction, undermining forensic integrity and downstream log analysis workflows.
Affected Products
- IBM Cloud Pak for Data System 11.3.0.2
- IBM Cloud Pak for Data System 11.3.0.2 Interim Fix 001
Discovery Timeline
- 2026-09-04 - CVE-2026-14350 published to the National Vulnerability Database
- 2026-09-08 - CVE-2026-14350 last updated in NVD database
Technical Details for CVE-2026-14350
Vulnerability Analysis
The vulnerability resides in the log-writing routines of IBM Cloud Pak for Data System. Input received by the application is written to log files without proper neutralization of control characters such as carriage returns, line feeds, or terminal escape sequences. Attackers can leverage this weakness to inject forged log entries that appear to originate from legitimate components. Injected content may also carry sequences that break structured log parsers, poison downstream security information and event management pipelines, or hide malicious activity behind spoofed entries.
Root Cause
The root cause is improper output neutralization for logs, classified as [CWE-117]. The affected code paths accept attacker-controlled input and pass it directly into log write functions without sanitizing special characters or escape sequences. Because logs are commonly treated as trusted forensic artifacts, this lack of encoding creates an integrity gap.
Attack Vector
The attack vector is network-based and requires no authentication or user interaction. An attacker submits crafted input through an interface whose values are ultimately written to a log file. By embedding newline characters followed by fabricated log lines, the attacker inserts entries that mimic legitimate events. Refer to the IBM Support Page for vendor-published technical details.
No verified public exploit code is available for this CVE. The vulnerability mechanism follows the standard log injection pattern where unsanitized \r\n sequences allow an attacker to terminate the current log record and append forged records.
Detection Methods for CVE-2026-14350
Indicators of Compromise
- Log entries containing embedded carriage return or line feed characters within a single field value.
- Duplicate or out-of-sequence timestamps within Cloud Pak for Data System log files.
- Log lines with unexpected ANSI escape sequences or non-printable control characters.
- Audit entries attributed to internal components but arriving from external request contexts.
Detection Strategies
- Parse Cloud Pak for Data System logs with strict schema validation and flag records that violate the expected structure.
- Correlate application request logs with backend audit logs to identify forged entries that lack a corresponding upstream request.
- Alert on request payloads submitted to Cloud Pak for Data System endpoints containing URL-encoded %0d%0a or raw CRLF sequences.
Monitoring Recommendations
- Forward Cloud Pak for Data System logs to a centralized log platform that preserves raw bytes for integrity analysis.
- Baseline normal log volume and entry patterns, then alert on sudden spikes or anomalous entry formats.
- Monitor administrative interfaces for repeated malformed input consistent with injection probing.
How to Mitigate CVE-2026-14350
Immediate Actions Required
- Apply the IBM-provided remediation for Cloud Pak for Data System 11.3.0.2 as described on the IBM Support Page.
- Inventory all Cloud Pak for Data System deployments and confirm the installed interim fix level.
- Restrict network exposure of affected interfaces to trusted management networks until the fix is deployed.
Patch Information
IBM has published remediation guidance for CVE-2026-14350 on the IBM Support Page. Administrators should follow the vendor-documented upgrade path beyond Interim Fix 001 for Cloud Pak for Data System 11.3.0.2.
Workarounds
- Place a reverse proxy or web application firewall in front of Cloud Pak for Data System to strip or reject CRLF and control characters in request parameters.
- Enforce strict input validation upstream, rejecting non-printable characters in fields that are known to be logged.
- Treat log files as untrusted input for downstream tooling and normalize entries before ingestion into a SIEM.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.