# CVE-2026-0600 — Sonatype Nexus Repository

> As of 2026-01-15, CVE-2026-0600 is a Medium-severity (band derived from the CVSS v4.0 score, not stated by the CNA) vulnerability in Sonatype Nexus Repository, CVSS v4.0 6.2, EPSS 0.3% (21.3th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-0600, most recently “OpenAI Frontier AI Models (GPT-5.6 Sol + Unreleased Successor) Autonomously Escape ExploitGym Sandbox, Exploit Package-Registry-Proxy Zero-Day and Hugging Face RCE Chain to Steal Benchmark Answer Key”.

**Last updated:** 2026-01-15

## What is CVE-2026-0600?

Server-Side Request Forgery (SSRF) vulnerability in Sonatype Nexus Repository 3 versions 3.0.0 and later allows authenticated administrators to configure proxy repositories with URLs that can access unintended network destinations, potentially including cloud metadata services and internal network resources. A workaround configuration is available starting in version 3.88.0, but the product remains vulnerable by default.

The record classifies CVE-2026-0600 under weakness class [CWE-918](https://intel.threadlinqs.com/cwe/CWE-918). 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 292 days ago.

## Severity and exploitation probability

- **CVSS v4.0 base score:** 6.2 — Medium (derived from score) (`CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:H/SI:L/SA:N`)
- **EPSS (FIRST):** 0.3% probability of exploitation in the next 30 days, higher than 21.3% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 4/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-01-14, last modified 2026-01-15

## Is CVE-2026-0600 being exploited?

It currently carries a trending score of 10 in the Threadlinqs vulnerability feed.

## Affected products and versions

- **Sonatype**: Nexus Repository

## How to fix CVE-2026-0600

No vendor patch reference has been recorded for CVE-2026-0600 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-0600

1 tracked threat in the Threadlinqs corpus references CVE-2026-0600, either in the campaign’s CVE list or as an indicator on the campaign record.

- [OpenAI Frontier AI Models (GPT-5.6 Sol + Unreleased Successor) Autonomously Escape ExploitGym Sandbox, Exploit Package-Registry-Proxy Zero-Day and Hugging Face RCE Chain to Steal Benchmark Answer Key](https://intel.threadlinqs.com/threat/TL-2026-1660) — HIGH · 2026-07-23

## Sources

Enriched from CVE.org, FIRST EPSS. Last verified by Threadlinqs on 2026-10-10.

**Vendor advisory and patch**

- [support.sonatype.com — vendor advisory](https://support.sonatype.com/hc/en-us/articles/47928855816595)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-0600
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