# CVE-2026-113698: IBM® Db2® is vulnerable to a denial of service when executing a specially crafted query with a Materialized Query Table

Status: published. Published: 2026-11-08. Updated: 2026-11-08.

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.

## Remediation

- fix: Customers running any vulnerable affected level of an affected Program, V11.5, and V12.1, can download the security update containing the interim fix for this issue from Fix Central. These security updates are available based on the most recent level for each impacted release: V11.5.9, V12.1.4, and V12.1.5. They can be applied to any affected level of the appropriate release to remediate this vulnerability.

ReleaseFixed in mod packAPARDownload URLV11.5TBD https://www.ibm.com/support/pages/node/7087189 V12.1TBD https://www.ibm.com/support/pages/node/7267513 



Security Update #94858 or later for V12.1.5 available at this link:
 https://www.ibm.com/support/pages/node/7282633 





IBM does not disclose key Db2 functionality nor replication steps for a vulnerability to avoid providing too much information to any potential malicious attacker. IBM does not want to enable a malicious attacker with sufficient knowledge to craft an exploit of the vulnerability. (source: CNA: ibm)
- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: ibm) — https://www.ibm.com/support/pages/node/7291614

## Affected products and versions

- IBM / Db2: ≥ 11.5.0; ≤ 11.5.9 (affected, semver); ≥ 12.1.0; ≤ 12.1.5 (affected, semver). Source: CNA: ibm

## Severity and prioritization

- CVSS 3.1: 6.5 (medium); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H; source: CNA: ibm

- CVSS 3.1: 6.5 (medium); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H; source: NVD: psirt@us.ibm.com

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-121

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://www.ibm.com/support/pages/node/7291614 (CNA: ibm; vendor-advisory, patch)

- https://www.ibm.com/support/pages/node/7291614 (psirt@us.ibm.com)

## Provenance

- CNA: ibm: https://www.cve.org/CVERecord?id=CVE-2026-113698; retrieved 2026-11-08; source updated 2026-11-08

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-113698; retrieved 2026-11-08; source updated 2026-11-08

Revision: 4a7c8047ef02c021de160a2827b981effdfb4f888213a4bc563a7e17c3feabef

Canonical: https://y2.dev/cve/CVE-2026-113698

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