CVE-2026-18251 IBM i is Affected By Multiple Vulnerabilities in Navigator for i and Digital Certificate Manager for i.
Remote attackers can obtain sensitive information from IBM i Navigator and Digital Certificate Manager due to improper WebSocket origin validation.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-18251?
CVE-2026-18251 is a medium-severity vulnerability in IBM i, published on 14 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote attacker to obtain sensitive information due to improper validation of the WebSocket origin.
Weakness: CWE-1385
Which versions are affected by CVE-2026-18251?
How do I fix CVE-2026-18251?
No fix has been published for CVE-2026-18251 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-18251 being exploited?
There is no known exploitation of CVE-2026-18251 in the wild and no public exploit code.
Sources
Also known as GHSA-c6mc-4w4v-q86x.