Quick answers
- Is CVE-2026-17463 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-17463 being exploited in the wild.
- How severe is CVE-2026-17463?
- Medium severity, with a CVSS score of 6.5, published 14 September 2026.
- Which products and versions are affected?
- IBM Db2 11.5.0 through 11.5.9, 12.1.0 through 12.1.5; IBM DB2 Connect Server 11.5.0 through 11.5.9, 12.1.0 through 12.1.5.
- Is there a fix for CVE-2026-17463?
- 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-2026-17463 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-17463?
- Check whether you run IBM Db2 or IBM DB2 Connect Server 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
This vulnerability is a denial of service flaw caused by uncontrolled resource consumption (CWE-400) in IBM Db2 versions 11.5.0–11.5.9 and 12.1.0–12.1.5 on Linux, UNIX, and Windows platforms (including Db2 Connect Server). Attack requires network access and valid database authentication (PR:L in CVSS vector), but no user interaction. An authenticated attacker can send specially crafted requests that exhaust server resources, rendering the database unavailable. Security updates are available for v11.5.9, v12.1.4, and v12.1.5; IBM has not disclosed exploit details to prevent misuse.
Affected products
- IBM Db2 11.5.0 through 11.5.9, 12.1.0 through 12.1.5
- IBM Db2 Connect Server 11.5.0 through 11.5.9, 12.1.0 through 12.1.5
Timeline
- 2026-09-14: disclosed