CVE-2026-18671 IBM i is Affected By Multiple Vulnerabilities in NetServer
An authenticated attacker can cause a temporary denial of service in IBM i NetServer via an integer overflow in request processing.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-18671?
CVE-2026-18671 is a medium-severity vulnerability in Ibm I, published on 13 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
IBM i 7.6, 7.5, 7.4, and 7.3 could allow an authenticated attacker to force a NetServer server thread exception, caused by an integer overflow during bounds checking in request processing. The attacker could exploit this vulnerability to cause a temporary denial of service.
Weakness: CWE-190
Which versions are affected by CVE-2026-18671?
It affects 1 product.
Products include Ibm I.
How do I fix CVE-2026-18671?
No fix has been published for CVE-2026-18671 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-18671 being exploited?
There is no known exploitation of CVE-2026-18671 in the wild and no public exploit code.
Other vulnerabilities in Ibm I
- CVE-2026-96119 IBM i is Affected By An Improper Control of Code Generation Vulnerability in HTTP Server Administration GUI
- CVE-2026-16860 IBM i is Affected By Remote Code Execution Vulnerability []
- CVE-2026-17083 IBM i is Affected By Multiple Vulnerabilities in the Debug Server
- CVE-2026-17218 IBM i is Affected By Remote Code Execution Vulnerability in Line Printer Daemon []
- CVE-2026-17276 IBM i is Affected By Multiple Vulnerabilities in Navigator for i
Sources
Also known as GHSA-3gvr-7jcv-xhw7.