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