# CVE-2026-87958: IBM Db2 denial of service via privilege management

Source: https://junglewise.ai/threats/cve-2026-87958-ibm-db2-denial-of-service-via-privilege-management  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-10. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-87958 · Severity: high · CVSS 8.1 · Published 2026-09-10

IBM Db2 is a relational database server used by enterprises to store and manage critical business data. A DBADM-privileged attacker (typically a database administrator) can exploit this vulnerability to disable specific database functionality and cause service unavailability under certain conditions. This impacts business operations and data availability, though it requires administrative privileges to execute.

Technologies: [IBM Db2](https://junglewise.ai/threats/technologies/db2). Vendors: [IBM](https://junglewise.ai/threats/vendors/ibm).

## Quick answers

**Is CVE-2026-87958 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-87958 being exploited in the wild.

**How severe is CVE-2026-87958?** High severity, with a CVSS score of 8.1, published 10 September 2026.

**Which products and versions are affected?** IBM Db2 11.5.0 through 11.5.9, 12.1.0 through 12.1.5.

**Is there a fix for CVE-2026-87958?** 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-2026-87958 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-87958?** Check whether you run IBM Db2 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

The vulnerability is a privilege management flaw (CWE-269) affecting Db2 versions 11.5.0–11.5.9 and 12.1.0–12.1.5. A user with DBADM (database administrator) authority can disable specific Db2 server functionality under certain conditions, leading to denial of service. The attack requires network access and valid DBADM credentials; no user interaction is needed. IBM has not disclosed the specific functionality affected or detailed attack steps to prevent weaponization. Patches are available via IBM security updates for V11.5.9, V12.1.4, and V12.1.5.

## Affected products

- IBM Db2 11.5.0 through 11.5.9, 12.1.0 through 12.1.5

## Timeline

- 2026-09-10: disclosed: Initial publication of security bulletin
- 2026-09-16: advisory: Title and summary updated to specify DBADM privilege requirements

## References

- [https://www.ibm.com/support/pages/node/7286987](https://www.ibm.com/support/pages/node/7286987)

## Related threats

- [IBM Db2 denial of service in Materialized Query Table query processing](https://junglewise.ai/threats/cve-2026-113698-ibm-db2-11-5-0-through-11-5-9-and-12-1-0-through-12-1-5-is)
- [IBM Db2 denial of service in Materialized Query Table](https://junglewise.ai/threats/cve-2026-104332-ibm-db2-11-5-0-through-11-5-9-and-12-1-0-through-12-1-5-is)
- [IBM Db2 local privilege escalation in db2pd utility](https://junglewise.ai/threats/cve-2026-78404-ibm-db2-11-5-0-through-11-5-9-and-12-1-0-through-12-1-5-is)
- [IBM Db2 arbitrary library loading via CREATE WRAPPER](https://junglewise.ai/threats/cve-2026-18166-ibm-db2-11-5-0-through-11-5-9-and-12-1-0-through-12-1-5-for-linux)
- [IBM Db2 denial of service in XML column insertion](https://junglewise.ai/threats/cve-2026-105466-ibm-db2-11-5-0-through-11-5-9-and-12-1-0-through-12-1-5-is)