# CVE-2026-0601: Nexus Repository 3 - Cross-Site Scripting

> Unauthenticated attackers can execute arbitrary JavaScript in victims' browsers via reflected XSS in Nexus Repository 3, requiring user interaction.

- **Severity:** Medium 5.1 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 14 Jan 2026
- **Updated:** 15 Jan 2026
- **Also known as:** GHSA-7j27-hv22-fqgw

## What is CVE-2026-0601?

CVE-2026-0601 is a medium-severity cross-site scripting vulnerability in Sonatype Nexus Repository, published on 14 Jan 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

A reflected cross-site scripting vulnerability exists in Nexus Repository 3 that allows unauthenticated attackers to execute arbitrary JavaScript in a victim's browser through a specially crafted request requiring user interaction.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2026-0601?


## How do I fix CVE-2026-0601?

No fix has been published for CVE-2026-0601 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-0601 being exploited?

There is no known exploitation of CVE-2026-0601 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-0601 and fix it if it is affected.

What it is: CVE-2026-0601 is a medium-severity cross-site scripting vulnerability in Sonatype Nexus Repository, published on 14 Jan 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-0601 in the wild and no public exploit code.

Affected product: Sonatype Nexus Repository. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-0601/ (Markdown: https://insights.sbomify.com/CVE-2026-0601/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-0601
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-0601
- OSV: https://osv.dev/vulnerability/CVE-2026-0601

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-0601/
Summaries are generated and may contain mistakes; the official description above is the record.