# 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.

Published Jan 6, 2026

## CVSS Score
Medium

6.2

## Security Details
### Components Impacted
- Sonatype Research

### CVE Description
CVE-2026-0600

### CWE
CWE-918 [Learn more about CWE-918](https://cwe.mitre.org/data/definitions/918.html)

CVE Description: 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.

Published: Jan 6, 2026

## CVSS Score & Severity
6.2 Medium

## CVSS Vector
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 Score
0.063%

## Malware
malware

## KEV Status
Not in KEV Catalog: No known exploits

## Vulnerable Methods
- `org/sonatype/nexus/blobstore/s3/internal/S3BlobStoreDescriptor.<init>(Lorg/sonatype/nexus/blobstore/quota/BlobStoreQuotaService;Lorg/sonatype/nexus/blobstore/api/BlobStoreManager;Ljavax/inject/Provider;)V`
- `org/sonatype/nexus/blobstore/s3/internal/S3BlobStoreDescriptor.validateConfig(Lorg/sonatype/nexus/blobstore/api/BlobStoreConfiguration;)V`
- `org/sonatype/nexus/repository/proxy/ProxyFacetSupport.fetch(Ljava/lang/String;Lorg/sonatype/nexus/repository/view/Context;Lorg/sonatype/nexus/repository/view/Content;)Lorg/sonatype/nexus/repository/view/Content;`

**JVM Vulnerable params:** 2, 0, 0

## Affected Ecosystems
Source: National Vulnerability Database

## References
- [Support Sonatype](https://support.sonatype.com/hc/en-us/articles/47928855816595-CVE-2026-0600-Nexus-Repository-3-Server-Side-Request-Forgery-2026-01-13)