# CVE-2026-97665: Sonatype Nexus Repository NuGet symbol upload authorization bypass

Source: https://junglewise.ai/threats/cve-2026-97665-a-missing-authorization-check-in-nexus-repository-3-s-nuget  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-15. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-97665 · Severity: info · Published 2026-10-15

Nexus Repository 3 is a central package management system used by organizations to store and distribute software components. A flaw in the NuGet symbol package upload feature allows users with read-only access to upload malicious or unauthorized packages to repositories they shouldn't be able to modify, potentially compromising the integrity of software supply chains. If anonymous access is enabled, attackers don't even need valid credentials to exploit this.

Vendors: [Sonatype](https://junglewise.ai/threats/vendors/sonatype).

## Quick answers

**Is CVE-2026-97665 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-97665 being exploited in the wild.

**How severe is CVE-2026-97665?** Informational severity, published 15 October 2026.

**Which products and versions are affected?** Sonatype Nexus Repository 3 CE/Pro 3.95.0 through 3.96.x.

**Is there a fix for CVE-2026-97665?** Yes: fixed in Nexus Repository 3 CE/Pro 3.97.0. Until then: Disable the NuGet Symbol Server feature on any hosted NuGet repositories, or restrict read and browse role assignment on NuGet hosted repositories to fully trusted accounts until the upgrade is applied. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-97665 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-97665?** Check whether you run Sonatype Nexus Repository 3 CE/Pro at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in Nexus Repository 3 CE/Pro 3.97.0

Disable the NuGet Symbol Server feature on any hosted NuGet repositories, or restrict read and browse role assignment on NuGet hosted repositories to fully trusted accounts until the upgrade is applied.

## Technical details

A missing authorization check in the NuGet Components API upload endpoint (CWE-862) allows accounts holding only read and browse privileges to upload symbol packages (.snupkg files) to hosted NuGet repositories with Symbol Server enabled, bypassing the write-permission enforcement. This requires either an authenticated low-privileged account or exploits the default anonymous user permissions if anonymous access is enabled.

## Affected products

- Sonatype Nexus Repository 3 CE/Pro 3.95.0 through 3.96.x

## Timeline

- 2026-10-15: disclosed

## References

- [https://help.sonatype.com/en/sonatype-nexus-repository-3-97-0-release-notes.html](https://help.sonatype.com/en/sonatype-nexus-repository-3-97-0-release-notes.html)
- [https://support.sonatype.com/hc/en-us/articles/55793090807827/](https://support.sonatype.com/hc/en-us/articles/55793090807827/)