CVE-2026-78498 Dimension Server-Side Request Forgery via Email Server Test Settings
An authenticated privileged attacker can exploit an SSRF vulnerability in WatchGuard Dimension to enumerate network services on adjacent systems.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-78498?
CVE-2026-78498 is a medium-severity server-side request forgery vulnerability in WatchGuard Dimension, published on 27 Aug 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
A server-side request forgery (SSRF) vulnerability WatchGuard Dimension Email Server Test configuration allows an authenticated privileged attacker to enumerate exposed network services on adjacent network systems.
Weakness: CWE-918
Which versions are affected by CVE-2026-78498?
How do I fix CVE-2026-78498?
No fix has been published for CVE-2026-78498 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-2026-78498 being exploited?
There is no known exploitation of CVE-2026-78498 in the wild and no public exploit code.
Sources
Also known as GHSA-27h4-xhmx-rq4q.