# CVE-2026-15955: IBM Db2 arbitrary file write via path traversal

Source: https://junglewise.ai/threats/cve-2026-15955-ibm-db2-arbitrary-file-write-via-path-traversal  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-14. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-15955 · Severity: high · CVSS 7.5 · Published 2026-09-14

IBM Db2 is a database server and client software suite used by enterprises to store and manage critical data. A flaw in the Db2 JDBC/SQLJ client driver allows a malicious database server to write arbitrary files on a client computer, potentially enabling data theft, malware installation, or operational disruption. This vulnerability affects versions 11.5.0–11.5.9 and 12.1.0–12.1.5 on Linux and Unix systems.

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

## Quick answers

**Is CVE-2026-15955 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-15955 being exploited in the wild.

**How severe is CVE-2026-15955?** High severity, with a CVSS score of 7.5, published 14 September 2026.

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

**Is there a fix for CVE-2026-15955?** 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-2026-15955 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-15955?** 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 path traversal flaw (CWE-22) in the IBM Db2 JDBC and SQLJ client driver that fails to properly validate file paths. An attacker controlling a malicious Db2 server can exploit this during client connection to write arbitrary files on the connected client system. The attack is network-accessible, requires no user interaction, and operates over the standard database connection protocol. No authentication is required at the application level; the attacker must control or compromise the server itself. Patches are available for affected versions (11.5.9, 12.1.4, and 12.1.5) via IBM Support security updates.

## Affected products

- IBM Db2 11.5.0–11.5.9, 12.1.0–12.1.5

## Timeline

- 2026-09-14: disclosed: IBM security bulletin published

## References

- [https://www.ibm.com/support/pages/node/7286998](https://www.ibm.com/support/pages/node/7286998)

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