Reflected XSS in Sonatype Nexus Repository Allows Remote Script Execution

Publication date: 2026-04-08

Last updated on: 2026-04-08

Assigner: Sonatype

Description

A reflected cross-site scripting vulnerability exists in Sonatype Nexus Repository versions 3.0.0 through 3.90.2 that allows unauthenticated remote attackers to execute arbitrary JavaScript in a victim's browser through a specially crafted URL. Exploitation requires user interaction.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-04-08

Last Modified

2026-04-08

Generated

2026-07-06

AI Q&A

2026-04-09

EPSS Evaluated

2026-07-05

NVD

CVE-2026-3438

EUVD

EUVD-2026-20757

Affected Vendors & Products

Vendor	Product	Version / Range
sonatype	nexus_repository	From 3.0.0 (inc) to 3.90.2 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-79	The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

Attack-Flow Graph

Executive Summary

This vulnerability is a reflected cross-site scripting (XSS) issue found in Sonatype Nexus Repository versions 3.0.0 through 3.90.2. It allows unauthenticated remote attackers to execute arbitrary JavaScript code in the browser of a victim by tricking them into clicking a specially crafted URL. Exploitation requires the victim to interact with the malicious link.

Impact Analysis

The impact of this vulnerability is that an attacker can execute arbitrary JavaScript in the victim's browser without authentication. This can lead to theft of sensitive information, session hijacking, or other malicious actions performed in the context of the victim's browser session. However, exploitation requires user interaction, such as clicking a malicious link.

Hi! I’m here to help you understand CVE-2026-3438. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70