---
id: "CVE-2026-113698"
page: "https://infrastack.ai/live/CVE-2026-113698"
kind: "vulnerability"
aliases: ["CVE-2026-113698"]
title: "IBM Db2: a crafted query on Materialized Query Tables crashes the database"
severity: "medium"
cvss: 6.5
epss: null
exploited: false
status: "open"
category: "vendor"
products: []
ecosystems: []
tags: ["databases", "db2", "ibm-db2", "vendor"]
not_affected_if: ["no-materialized-query-tables", "other-db2-versions"]
published_at: "2026-11-08T17:16:36+00:00"
first_seen_at: "2026-11-08T17:22:01+00:00"
updated_at: "2026-11-08T17:24:17+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-113698", "first_seen_at": "2026-11-08T17:22:01+00:00"}]
exploit_sources: []
---

# IBM Db2: a crafted query on Materialized Query Tables crashes the database

Link for people: https://infrastack.ai/live/CVE-2026-113698 (this .md is for agents)

IBM Db2 versions 11.5.0 through 11.5.9 and 12.1.0 through 12.1.5 can be denied service by a specially crafted query that uses a Materialized Query Table. An attacker who can run that query can make the database unavailable.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed Db2 version with `db2level` and compare it against the affected ranges 11.5.0 through 11.5.9 and 12.1.0 through 12.1.5.
- Check whether the database uses Materialized Query Tables (MQTs), for example by querying the catalog view SYSCAT.TABLES for TYPE 'S' (summary tables).

## Fix

- IBM Db2 11.5.0 through 11.5.9 and 12.1.0 through 12.1.5 are affected; the sources do not state a fixed version.

## Timeline

- 2026-11-08T17:22:01+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-113698

## From the sources

IBM Db2 11.5.0 through 11.5.9, and 12.1.0 through 12.1.5 is vulnerable to a denial of service when executing a specially crafted query with a Materialized Query Table.

---

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