# CVE-2026-16879: IBM Db2 Mirror for i authorization bypass

Source: https://junglewise.ai/threats/cve-2026-16879-ibm-db2-mirror-for-i-authorization-bypass  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-14. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-16879 · Severity: high · CVSS 8.8 · Published 2026-08-14

IBM Db2 Mirror for i is a database management interface for IBM's i operating system. An authenticated attacker can bypass security restrictions due to improper authorization checks, potentially gaining unauthorized access to sensitive database functions and data. This vulnerability requires valid credentials but allows circumvention of access controls once inside the system.

Technologies: [IBM Db2 Mirror For I](https://junglewise.ai/threats/technologies/db2-mirror-for-i). Vendors: [IBM](https://junglewise.ai/threats/vendors/ibm).

## Quick answers

**Is CVE-2026-16879 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-16879 being exploited in the wild.

**How severe is CVE-2026-16879?** High severity, with a CVSS score of 8.8, published 14 August 2026.

**Which products and versions are affected?** IBM Db2 Mirror For I 7.4, 7.5, 7.6.

**Is there a fix for CVE-2026-16879?** 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-2026-16879 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-16879?** Check whether you run IBM Db2 Mirror For I 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 an authorization bypass (CWE-285: Improper Authorization) in Db2 Mirror for i that allows an authenticated remote attacker to bypass security restrictions through improper validation of user-supplied input. The flaw is in how the application enforces access control; a legitimate user with credentials can craft requests that circumvent authorization checks intended to restrict certain operations. The attack requires valid authentication credentials and network access to the Db2 Mirror for i interface, but no special user interaction. An attacker can use this to access data or perform operations beyond their assigned privileges. Patches are available from IBM.

## Affected products

- IBM Db2 Mirror for i 7.4, 7.5, 7.6

## Timeline

- 2026-08-14: disclosed

## References

- [https://www.ibm.com/support/pages/node/7283359](https://www.ibm.com/support/pages/node/7283359)

## Related threats

- [IBM Db2 Mirror for i privilege escalation in GUI](https://junglewise.ai/threats/cve-2026-96012-ibm-db2-mirror-for-i-7-4-7-5-and-7-6-is-vulnerable-to-privilege)
- [IBM Db2 Mirror for i CSRF in GUI](https://junglewise.ai/threats/cve-2026-17047-ibm-db2-mirror-for-i-csrf-in-gui)
- [IBM Db2 Mirror for i improper authorization in SQL procedure](https://junglewise.ai/threats/cve-2026-17483-ibm-db2-mirror-for-i-improper-authorization-in-sql-procedure)
- [IBM Db2 Mirror for i out-of-bounds read denial of service](https://junglewise.ai/threats/cve-2026-16660-ibm-db2-mirror-for-i-out-of-bounds-read-denial-of-service)
- [IBM Db2 Mirror for i race condition in Unix domain socket path](https://junglewise.ai/threats/cve-2026-18567-ibm-db2-mirror-for-i-race-condition-in-unix-domain-socket-path)