CVE-2026-97665: Nexus Repository 3 - Missing Authorization on NuGet Symbol Package Upload

Severity: high (CVSS 7.1 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-15 · updated 2026-10-16
Weakness: CWE-862

Description

A missing authorization check in Nexus Repository 3's NuGet Components API upload path allows an account holding only repository read and browse privileges to upload and persist NuGet symbol packages (.snupkg) to a hosted repository, bypassing the write-permission check enforced for ordinary package uploads. Exploitation requires a hosted NuGet repository with Symbol Server enabled. If anonymous access is enabled, the built-in anonymous user holds read and browse privileges across all repositories by default, so this precondition can also be met without an authenticated account.

Affected products

Sonatype Nexus Repository 3: from 3.95.0 before 3.97.0 — fixed in 3.97.0

How to fix

Upgrade to a fixed version: Sonatype Nexus Repository 3 3.97.0. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2026-97665 or the next vulnerability affects your stack