CVE-2026-16896 IBM i is Affected By Multiple Vulnerabilities in Network Authentication Service
A local authenticated attacker can exploit a race condition in IBM i to gain unauthorized access to files.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-16896?
CVE-2026-16896 is a high-severity vulnerability in Ibm I, published on 13 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
IBM i 7.6, 7.5, 7.4, and 7.3 could allow a local authenticated attacker to obtain unauthorized access to files due to a time-of-check time-of-use (TOCTOU) race condition.
Weakness: CWE-367
Which versions are affected by CVE-2026-16896?
It affects 1 product.
Products include Ibm I.
How do I fix CVE-2026-16896?
No fix has been published for CVE-2026-16896 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-16896 being exploited?
There is no known exploitation of CVE-2026-16896 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-5j9j-5mc9-fhx9.