CVE-2026-13361

Analyzed Analyzed - Analysis Complete

Remote Code Execution in IBM Informix oninit

Publication date: 2026-08-12

Last updated on: 2026-08-18

Assigner: IBM Corporation

Description

IBM Informix oninit sq_sgkprepare RCE via unchecked SQL Interface length field.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-08-12

Last Modified

2026-08-18

Generated

2026-09-02

AI Q&A

2026-08-13

EPSS Evaluated

2026-08-31

NVD

CVE-2026-13361

EUVD

EUVD-2026-57533

Affected Vendors & Products

Vendor	Product	Version / Range
ibm	informix_dynamic_server	12.10
ibm	informix_dynamic_server	14.10
ibm	informix_dynamic_server	From 15.0 (inc) to 15.0.1.14 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-121	A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).

Attack-Flow Graph

Executive Summary

This vulnerability is a remote code execution flaw in IBM Informix Dynamic Server's SQL Interface component. An authenticated client can send a specially crafted request that triggers a stack-based buffer overflow in the oninit sq_sgkprepare function due to an unchecked SQL Interface length field.

Detection Guidance

Detecting this vulnerability requires checking the version of IBM Informix Dynamic Server installed on your system. Compare the version against the affected versions (14.10, 12.10.x, 15.0) and the patched versions (14.10.xC13W13, 15.0.1.14). Use commands like 'onstat -' or check the installation directory for version files.

Impact Analysis

An attacker could exploit this to execute arbitrary code on the server, potentially leading to unauthorized access, data theft, or system compromise. The high CVSS score of 8.8 indicates significant risk to confidentiality, integrity, and availability.

Compliance Impact

This vulnerability could lead to unauthorized data access or modification, violating GDPR's data protection requirements and HIPAA's security rules for protected health information. Organizations must address it to maintain compliance.

Mitigation Strategies

Upgrade IBM Informix Dynamic Server to fixed versions 14.10.xC13W13 or 15.0.1.14 available via IBM Fix Central. No workarounds are provided, so patching is required to address the vulnerability.

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