# CVE-2026-78498: WatchGuard Dimension server-side request forgery in email server test

Source: https://junglewise.ai/threats/cve-2026-78498-watchguard-dimension-server-side-request-forgery-in-email-server  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-28. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-78498 · Severity: info · CVSS 5.1 · Published 2026-08-28

WatchGuard Dimension is a security and network management platform used by organizations to monitor and control network infrastructure. This vulnerability allows an authenticated administrator to bypass normal network boundary controls and scan for exposed services on adjacent network systems, potentially discovering unpatched systems or unauthorized devices on the network.

Technologies: [Watchguard Dimension](https://junglewise.ai/threats/technologies/dimension). Vendors: [Watchguard](https://junglewise.ai/threats/vendors/watchguard).

## Quick answers

**Is CVE-2026-78498 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-78498 being exploited in the wild.

**How severe is CVE-2026-78498?** Informational severity, with a CVSS score of 5.1, published 28 August 2026.

**Which products and versions are affected?** Watchguard Dimension 2.0 to 2.3.0.

**Is there a fix for CVE-2026-78498?** A patch was published on 2026-08-27: Fixed in version 2.3.1 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-78498 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-78498?** Check whether you run Watchguard Dimension at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A server-side request forgery (SSRF) vulnerability exists in WatchGuard Dimension's Email Server Test configuration feature. An authenticated user with administrative privileges can craft requests that force the Dimension server to perform HTTP requests to arbitrary network addresses, allowing enumeration of services on adjacent network systems. The vulnerability requires authentication and administrative privileges to exploit. An attacker can discover exposed internal network services and their versions, which can be used for further network reconnaissance or targeted attacks. The issue is fixed in Dimension version 2.3.1.

## Affected products

- WatchGuard Dimension 2.0 to 2.3.0

## Timeline

- 2026-08-27: disclosed
- 2026-08-27: patched: Fixed in version 2.3.1

## References

- [https://psirt.watchguard.com/CVE-2026-78498](https://psirt.watchguard.com/CVE-2026-78498)

## Related threats

- [WatchGuard Dimension business logic flaw in backend operations](https://junglewise.ai/threats/cve-2026-78618-watchguard-dimension-business-logic-flaw-in-backend-operations)
- [WatchGuard Dimension missing rate-limiting on web login](https://junglewise.ai/threats/cve-2026-78617-watchguard-dimension-missing-rate-limiting-on-web-login)
- [WatchGuard Dimension stored XSS in Trusted CA certificate configuration](https://junglewise.ai/threats/cve-2026-78616-watchguard-dimension-stored-xss-in-trusted-ca-certificate)
- [WatchGuard Dimension reflected XSS in report detail page](https://junglewise.ai/threats/cve-2026-78615-watchguard-dimension-reflected-xss-in-report-detail-page)
- [WatchGuard Dimension SQL injection in audit report feature](https://junglewise.ai/threats/cve-2026-78614-watchguard-dimension-sql-injection-in-audit-report-feature)