What is CVE-2026-7771?

CVE-2026-7771 is a medium-severity vulnerability in IBM Db2, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 5.5/10. Published 2026-07-17.

How severe is CVE-2026-7771?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Vulnerability in IBM Db2

CVE-2026-7771

IBM Db2 11.5.0 through 11.5.9, and 12.1.0 through 12.1.4 is vulnerable to a trap when compiling a specially crafted statements containing subqueries could lead to a denial of service.

Published 2026-07-17 · last modified 2026-07-24.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.001 (3.6th percentile), scored 2026-10-15.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 4th percentile — 3.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000

Affected products

IBM Db2 — versions 11.5.0, 12.1.0

Weakness classification (CWE)

CWE-835 — Loop with Unreachable Exit Condition (Infinite Loop)

References

www.ibm.com/support/pages/node/7279480 (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-7771?: CVE-2026-7771 is a medium-severity vulnerability in IBM Db2, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 5.5/10. Published 2026-07-17.
How severe is CVE-2026-7771?: Medium severity. CVSS v3 base score is 5.5 out of 10.