Reflected XSS in Sonatype Nexus Repo 3.0.0-3.90.2 via Craft URL
CVE-2026-3438 Published on April 8, 2026
Nexus Repository 3 - Reflected Cross-Site Scripting (XSS) in ?describe Pages
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.
Vulnerability Analysis
CVE-2026-3438 is exploitable with network access. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.
Weakness Type
What is a XSS Vulnerability?
The software 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.
CVE-2026-3438 has been classified to as a XSS vulnerability or weakness.
Products Associated with CVE-2026-3438
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Affected Versions
Sonatype Nexus Repository:- Version 3.0.0 and below 3.91.0 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.