CVE-2026-77122 Missing authorization in Nexus Repository 3

Medium 5.3 Published 2 Sep 2026 Updated 2 Sep 2026

Attackers with group repository permissions can access unauthorized member repository metadata, including internal URLs, via the REST API.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2026-77122?

CVE-2026-77122 is a medium-severity missing authorization vulnerability in Sonatype Nexus Repository Manager, published on 2 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

An authorization flaw in the REST API repository details endpoint (GET /service/rest/v1/repositories/{repositoryName}) in Sonatype Nexus Repository 3 allowed an account holding read or browse permission on a group repository to retrieve metadata for member repositories on which it held no direct permission, by requesting the endpoint directly for the member repository name. For proxy repositories, the disclosed metadata includes the configured remote URL, which may reveal internal upstream hostnames. This includes the anonymous user if it has been granted this permission; whether the anonymous user holds this permission depends on the role and permission configuration of the specific installation.

Weakness: CWE-863

Which versions are affected by CVE-2026-77122?

It affects 1 product.

Products include Sonatype Nexus Repository Manager.

How do I fix CVE-2026-77122?

Apply the vendor's patch.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2026-77122 being exploited?

There is no known exploitation of CVE-2026-77122 in the wild and no public exploit code.

All Sonatype Nexus Repository Manager vulnerabilities

Sources

Also known as GHSA-86mj-jv63-p44v, MINI-5g52-fmvj-vvpm, MINI-q6x9-fp9q-3229.