CVE-2026-18869 IBM i is Affected By Denial of Service and Security Restriction Bypass Vulnerabilities in FTP [, ]
Remote authenticated attackers can bypass security restrictions to access internal network services via improper FTP command validation.
- 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-2026-18869?
CVE-2026-18869 is a medium-severity server-side request forgery vulnerability in IBM i, published on 18 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote authenticated attacker to bypass security restrictions and access internal network services due to improper validation of FTP PORT and EPRT commands.
Weakness: CWE-918
Which versions are affected by CVE-2026-18869?
How do I fix CVE-2026-18869?
No fix has been published for CVE-2026-18869 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-18869 being exploited?
There is no known exploitation of CVE-2026-18869 in the wild and no public exploit code.
Sources
Also known as GHSA-m47x-fj2g-vfr5.