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CVE-2026-77122

4.3 · MEDIUM

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 permi…

Published Sep 2, 2026sonatypeCWE-863EPSS 0.28%

Overview

CVE-2026-77122 is a medium-severity vulnerability affecting sonatype nexus_repository_manager. It was published on September 2, 2026 and has a CVSS 3.1 base score of 4.3 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 4.3, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories and patches from sonatype. Update nexus_repository_manager to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
sonatypenexus_repository_manager>= 3.38.0, < 3.96.0Affected

References

Refhelp.sonatype.com/en/sonatype-nexus-repository-3-96-0-release-notes.htmlRefsupport.sonatype.com/hc/en-us/articles/54637328224019/

How CyberStrike helps

Frequently asked questions

What is CVE-2026-77122?

CVE-2026-77122 is a medium-severity vulnerability affecting sonatype nexus_repository_manager. It was published on September 2, 2026 and has a CVSS 3.1 base score of 4.3 (MEDIUM).

How severe is CVE-2026-77122?

This vulnerability has a CVSS 3.1 base score of 4.3, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-77122?

Check the references section for vendor advisories and patches from sonatype. Update nexus_repository_manager to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-77122?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-77122 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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