CVE-2026-0600
📋 TL;DR
This SSRF vulnerability in Sonatype Nexus Repository 3 allows authenticated administrators to configure proxy repositories with URLs that can access unintended network destinations. This could lead to internal network scanning or cloud metadata service access. Only authenticated administrators can exploit this vulnerability.
💻 Affected Systems
- Sonatype Nexus Repository 3
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Attackers could access cloud metadata services to obtain credentials, then pivot to other cloud resources, or scan internal networks to discover and attack other systems.
Likely Case
Internal network reconnaissance leading to discovery of other vulnerable systems, or accessing internal services that shouldn't be exposed.
If Mitigated
Limited to authenticated administrators only, reducing attack surface significantly if proper access controls are in place.
🎯 Exploit Status
Exploitation requires authenticated administrator access to configure proxy repositories with malicious URLs.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: https://support.sonatype.com/hc/en-us/articles/47928855816595
Restart Required: No
Instructions:
No official patch available. Apply workaround configuration in Nexus Repository Manager UI: Navigate to Administration → System → HTTP, enable 'Block external IPs' setting.
🔧 Temporary Workarounds
Enable external IP blocking
allConfigure Nexus Repository to block requests to external IP addresses from proxy repositories
🧯 If You Can't Patch
- Restrict administrator access to only trusted personnel
- Implement network segmentation to limit Nexus Repository's access to internal networks
🔍 How to Verify
Check if Vulnerable:
Check if running Nexus Repository 3 version 3.0.0 or later and 'Block external IPs' setting is disabled in Administration → System → HTTPCheck Version:
Check Nexus Repository web interface footer or system information pageVerify Fix Applied:
Verify 'Block external IPs' setting is enabled in Administration → System → HTTP📡 Detection & Monitoring
Log Indicators:
- Unusual proxy repository configurations
- Requests to internal IP ranges or cloud metadata endpoints
Network Indicators:
- Outbound requests from Nexus Repository to internal network segments or cloud metadata services
SIEM Query:
source="nexus" AND (event="repository_configuration" OR url CONTAINS "169.254.169.254" OR url CONTAINS "metadata")