CVE-2026-1577 IBM® Db2® is vulnerable to a denial of service with a specially crafted query involving multiple subqueries
An authenticated user can cause a denial of service in IBM Db2 by submitting a specially crafted query with multiple subqueries.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-1577?
CVE-2026-1577 is a medium-severity denial of service vulnerability in Ibm Db2, published on 30 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
IBM Db2 11.5.0 through 11.5.9, and 12.1.0 through 12.1.4 for Linux, UNIX and Windows (includes Db2 Connect Server) could allow an authenticated user to cause a denial of service due to improper neutralization of special elements in data query logic.
Which versions are affected by CVE-2026-1577?
It affects 1 product.
Products include Ibm Db2.
How do I fix CVE-2026-1577?
No fix has been published for CVE-2026-1577 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-1577 being exploited?
There is no known exploitation of CVE-2026-1577 in the wild and no public exploit code.
Other vulnerabilities in Ibm Db2
Sources
Also known as GHSA-mcwg-ghgc-h3xj.