# CVE-2026-6938: IBM Db2 authorization bypass in remote object storage upload

Source: https://junglewise.ai/threats/cve-2026-6938-ibm-db2-authorization-bypass-in-remote-object-storage-upload  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-05-27. Updated: 2026-05-27  
License: CC BY 4.0 with a link back

CVE-2026-6938 · Severity: medium · CVSS 6.5 · Published 2026-05-27

IBM Db2 is a database management system used to store and manage large volumes of corporate data. A security flaw in certain versions allows an authenticated user to bypass authorization checks when uploading data to remote storage. This could allow an attacker to modify or overwrite files in remote object storage locations that they should not have access to, potentially compromising data integrity.

Technologies: [IBM Db2 for Linux, UNIX and Windows](https://junglewise.ai/threats/technologies/db2-for-linux-unix-and-windows). Vendors: [IBM](https://junglewise.ai/threats/vendors/ibm).

## Quick answers

**Is CVE-2026-6938 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-6938 being exploited in the wild.

**How severe is CVE-2026-6938?** Medium severity, with a CVSS score of 6.5, published 27 May 2026.

**Which products and versions are affected?** IBM Db2 for Linux, UNIX and Windows 12.1.0 - 12.1.4.

**Is there a fix for CVE-2026-6938?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-6938 attacked?** It is attacked over the network, in an operating system.

**Am I affected by CVE-2026-6938?** Check whether you run IBM Db2 for Linux or UNIX and Windows at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

IBM Db2 versions 12.1.0 through 12.1.4 are vulnerable to an improper authorization flaw (CWE-285). The vulnerability exists when performing uploads to remote object storage paths (using the DB2REMOTE protocol) via a 'special query.' An authenticated attacker with network access can exploit this to bypass intended access controls and perform unauthorized write operations to remote storage. The issue specifically affects Linux and UNIX deployments; Windows installations are not affected. IBM has released special builds for version 12.1.4 to address this issue (APAR DT468154).

## Affected products

- IBM Db2 for Linux, UNIX and Windows 12.1.0 - 12.1.4

## Timeline

- 2026-05-21: advisory: Initial publication by IBM
- 2026-05-27: disclosed: NVD publication date

## References

- [https://www.ibm.com/support/pages/node/7273559](https://www.ibm.com/support/pages/node/7273559)

## Related threats

- [IBM Db2 information disclosure in monitoring and event tables](https://junglewise.ai/threats/cve-2025-36372-ibm-db2-information-disclosure-in-monitoring-and-event-tables)
- [IBM Cloud APM and Db2 denial of service in Fenced environment](https://junglewise.ai/threats/cve-2026-3676-ibm-cloud-apm-and-db2-denial-of-service-in-fenced-environment)
- [IBM Db2 sensitive information disclosure in db2diag logs](https://junglewise.ai/threats/cve-2025-13755-ibm-db2-sensitive-information-disclosure-in-db2diag-logs)