CVE-2026-17597 Nexus Repository 3 - Server-Side Request Forgery via Email Configuration Verification

Medium 5.1 Published 7 Aug 2026 Updated 7 Aug 2026

An attacker with settings update permissions can trigger server-side requests to internal networks via email verification, potentially exposing internal service availability.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2026-17597?

CVE-2026-17597 is a medium-severity server-side request forgery vulnerability in Sonatype Nexus Repository Manager, published on 7 Aug 2026. An attacker needs administrator access to exploit it, with no action from the victim.

Official description

Nexus Repository 3 contains a Server-Side Request Forgery (SSRF) vulnerability in the email configuration verification feature. A user holding the nexus:settings:update permission could submit arbitrary host and port values to the email test/verification endpoint, causing the server to attempt outbound network connections to internal or otherwise restricted network addresses. Differences in the server's response could be used to infer whether internal hosts and ports are reachable. This issue affects Nexus Repository 3 CE/Pro versions up to and including 3.94.1, and is fixed in version 3.95.0.

Weakness: CWE-918

Which versions are affected by CVE-2026-17597?

It affects 1 product.

Products include Sonatype Nexus Repository Manager.

How do I fix CVE-2026-17597?

Upgrade to a fixed version.

Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.

Is CVE-2026-17597 being exploited?

There is no known exploitation of CVE-2026-17597 in the wild and no public exploit code.

All Sonatype Nexus Repository Manager vulnerabilities

Sources

Also known as GHSA-prvc-9rv9-3f72, MINI-5gg6-3pf8-cgw5, MINI-8jc8-pm5v-6f76.