What is CVE-2026-13361?

CVE-2026-13361 is a high-severity vulnerability in IBM Informix Dynamic Server, classified under Stack-based Buffer Overflow. CVSS score: 8.8/10. Published 2026-08-12.

How severe is CVE-2026-13361?

High severity. CVSS v3 base score is 8.8 out of 10.

Buffer overflow in IBM Informix Dynamic Server

CVE-2026-13361

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

Vulnerability class: Buffer Overflow

Published 2026-08-12 · last modified 2026-08-18.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (39.7th percentile), scored 2026-09-27.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 40th percentile — 39.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.005 · change: +0.002

Affected products

IBM Informix Dynamic Server — versions 14.10, 12.10.x, 15.0
IBM Informix Dynamic Server — versions 12.10, 14.10

Weakness classification (CWE)

CWE-121 — Stack-based Buffer Overflow

References

www.ibm.com/support/pages/node/7283143 (vendor-advisory, Patch, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-13361?: CVE-2026-13361 is a high-severity vulnerability in IBM Informix Dynamic Server, classified under Stack-based Buffer Overflow. CVSS score: 8.8/10. Published 2026-08-12.
How severe is CVE-2026-13361?: High severity. CVSS v3 base score is 8.8 out of 10.