# CVE-2026-3329: Nexus Repository Manager - Improper Restriction of Excessive Authentication Attempts

> Remote attackers can bypass authentication rate limits to guess user credentials in Sonatype Nexus Repository Manager.

- **Severity:** High 8.7 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 11 Jun 2026
- **Updated:** 11 Jun 2026
- **Also known as:** GHSA-pfx2-jf85-mvf2

## What is CVE-2026-3329?

CVE-2026-3329 is a high-severity authentication bypass vulnerability in Sonatype Nexus Repository Manager, published on 11 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A remote unauthenticated attacker may be able to conduct credential-guessing attacks against user accounts in Sonatype Nexus Repository via authentication endpoints.

Weakness: CWE-307 (Improper Restriction of Excessive Authentication Attempts)

## Which versions are affected by CVE-2026-3329?

It affects 1 product.


Products: Sonatype Nexus Repository Manager.

## How do I fix CVE-2026-3329?

No fix has been published for CVE-2026-3329 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-3329 being exploited?

There is no known exploitation of CVE-2026-3329 in the wild and no public exploit code.

## Other vulnerabilities in Sonatype Nexus Repository Manager

- [CVE-2019-7238](https://insights.sbomify.com/CVE-2019-7238/): Sonatype Nexus Repository Manager Incorrect Access Control (critical 9.8, exploited in the wild)
- [CVE-2019-9629](https://insights.sbomify.com/CVE-2019-9629/): Hardcoded credentials in n/a (critical 9.8)
- [CVE-2017-17717](https://insights.sbomify.com/CVE-2017-17717/): Hardcoded credentials in n/a (critical 9.8)
- [CVE-2026-3199](https://insights.sbomify.com/CVE-2026-3199/): Nexus Repository 3 - Authenticated Remote Code Execution via Task Property Injection (critical 9.4)
- [CVE-2026-5189](https://insights.sbomify.com/CVE-2026-5189/): Nexus Repository 3 - Hardcoded Credential in Internal Database Component (critical 9.2)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-3329 and fix it if it is affected.

What it is: CVE-2026-3329 is a high-severity authentication bypass vulnerability in Sonatype Nexus Repository Manager, published on 11 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-3329 in the wild and no public exploit code.

Affected product: Sonatype Nexus Repository Manager. 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-2026-3329/ (Markdown: https://insights.sbomify.com/CVE-2026-3329/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-3329
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-3329
- OSV: https://osv.dev/vulnerability/CVE-2026-3329

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-3329/
Summaries are generated and may contain mistakes; the official description above is the record.