CVE-2026-23597
📋 TL;DR
An information disclosure vulnerability in HPE Aruba Networking 5G Core server API error handling allows unauthenticated remote attackers to obtain sensitive information. This affects organizations using vulnerable versions of HPE Aruba Networking 5G Core software. Attackers can access user accounts, roles, system configuration, and internal service details.
💻 Affected Systems
- HPE Aruba Networking 5G Core
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers combine this information disclosure with other vulnerabilities to gain unauthorized access, elevate privileges, and potentially compromise the entire 5G core network infrastructure.
Likely Case
Attackers obtain sensitive configuration data, user information, and system details that facilitate further attacks or reconnaissance.
If Mitigated
Limited information leakage with no direct access to critical systems, though some configuration details may still be exposed.
🎯 Exploit Status
Exploitation requires sending malformed API requests to trigger error responses containing sensitive information.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check HPE advisory for specific patched versions
Vendor Advisory: https://support.hpe.com/hpesc/public/docDisplay?docId=hpesbnw05002en_us&docLocale=en_US
Restart Required: Yes
Instructions:
1. Review HPE advisory for affected versions. 2. Download and apply the recommended patch/update. 3. Restart affected services. 4. Verify the fix is applied.
🔧 Temporary Workarounds
Network Access Control
allRestrict API access to trusted IP addresses only
Configure firewall rules to limit API endpoint access
Error Response Sanitization
allImplement custom error handling to prevent sensitive data leakage
Configure API gateway or middleware to sanitize error responses
🧯 If You Can't Patch
- Implement strict network segmentation to isolate 5G core systems
- Deploy web application firewall (WAF) with rules to detect and block information disclosure attempts
🔍 How to Verify
Check if Vulnerable:
Send malformed requests to API endpoints and check if error responses contain sensitive informationCheck Version:
Check system documentation or administrative interface for software versionVerify Fix Applied:
Test that error responses no longer contain sensitive data after patch application📡 Detection & Monitoring
Log Indicators:
- Unusual API error patterns
- Multiple failed API requests from single sources
- Error logs containing sensitive data
Network Indicators:
- Unusual traffic to API error endpoints
- Patterns of malformed API requests
SIEM Query:
source="api_server" AND (message="*error*" OR status="5xx") | stats count by src_ip