CVE-2026-1577: IBM® Db2® is vulnerable to a denial of service with a specially crafted query involving multiple subqueries

Published Apr 15, 2026
·
Updated

IBM Db2 11.5.0 through 11.5.9, and 12.1.0 through 12.1.4 for Linux, UNIX and Windows (includes Db2 Connect Server) could allow an authenticated user to cause a denial of service due to improper neutralization of special elements in data query logic.

Other sources

IBM Db2 for Linux, UNIX and Windows (includes Db2 Connect Server) could allow an authenticated user to cause a denial of service due to improper neutralization of special elements in data query logic.

— IBM

Affected Software

9 affected components
IBM Db2 for Linux, UNIX and Windows>=11.5.0<=11.5.9, >=12.1.0<=12.1.4
IBM Db2 Linux>=11.5.0<=11.5.9
IBM Db2 Unix>=11.5.0<=11.5.9
IBM Db2 Windows>=11.5.0<=11.5.9
IBM Db2 Linux>=12.1.0<=12.1.4
IBM Db2 Unix>=12.1.0<=12.1.4
IBM Db2 Windows>=12.1.0<=12.1.4
IBM Cloud APM, Base Private<=8.1.4
IBM Cloud APM, Advanced Private<=8.1.4

Remediation

Information

Customers running any vulnerable affected level of an affected Program, V11.5, and V12.1, can download the special build containing the interim fix for this issue from Fix Central. These special builds are available based on the most recent level for each impacted release: V11.5.9, and V12.1.4. 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 V12.1 TBD https://www.ibm.com/support/pages/node/7267513 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.

Event History

Apr 30, 2026
CVE Published
via MITRE·09:49 PM
Data Sourced
via MITRE·09:49 PM
RemedyDescriptionSeverity
Data Sourced
via NVD·10:16 PM
DescriptionSeverityWeaknessAffected Software
May 21, 2026
Data Sourced
via IBM·12:00 AM
DescriptionAffected Software

Parent advisories

This vulnerability appears in the following advisories.

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Frequently Asked Questions

1

What is the severity of CVE-2026-1577?

CVE-2026-1577 has been classified as a high severity vulnerability due to its potential to cause denial of service.

2

How do I fix CVE-2026-1577?

To fix CVE-2026-1577, upgrade IBM Db2 to the latest version that is not affected, as detailed in IBM's security documentation.

3

Who is affected by CVE-2026-1577?

CVE-2026-1577 affects IBM Db2 versions 11.5.0 through 11.5.9 and 12.1.0 through 12.1.4 on Linux, UNIX, and Windows.

4

What kind of attack does CVE-2026-1577 expose?

CVE-2026-1577 exposes IBM Db2 to denial of service attacks through specially crafted queries involving multiple subqueries.

5

Is CVE-2026-1577 exploitable remotely?

CVE-2026-1577 is not exploitable remotely as it requires an authenticated user to trigger the denial of service.

Company

Resources

Contact

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