6.1Medium
Sonatype Nexus Repository Manager
CVE-2026-3438
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.
What this means for your business
- It affects Sonatype Nexus Repository Manager. It matters if your company, or a supplier that handles your data, runs it.
- An attacker can use it remotely, over a network, without a login, but only after tricking someone into an action such as opening a file or a link.
- FIRST's prediction model gives it a 0.4% chance of attack attempts being seen in the next 30 days, ranking above 32% of all known flaws.
What to do
- 1Check whether your company or your suppliers run Sonatype Nexus Repository Manager, and which version. The affected versions are listed further down this page.
- 2If you do, apply the vendor's fix. A patch or vendor advisory has been published.
Not sure if your company is exposed?
Fastnexa’s certified penetration testers can check whether attackers could use this flaw, or others like it, against your websites, apps and network. The full test is free for our first 10 founding clients until 31 December 2026.
Scoring
- CVSS
- 6.1 (v3.1)
- Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N- CVSS v4
- 5.1
- Weakness
- CWE-79
- Assigned by
- 103e4ec9-0a87-450b-af77-479448ddef11
Dates
- Published
- 2026-04-08
- Last modified
- 2026-09-18
- Sources
- NVD
Affected products
- Sonatype Nexus Repository Manager3.0.0 - 3.91.0
As listed in the NVD configuration data. Not a statement about your estate.