CVE-2026-25957
📋 TL;DR
CVE-2026-25957 is a denial-of-service vulnerability in Cube semantic layer that allows attackers to crash the entire Cube API with a specially crafted request. This affects all Cube deployments running vulnerable versions, potentially disrupting data applications that rely on Cube's API services.
💻 Affected Systems
- Cube semantic layer
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete unavailability of Cube API services, disrupting all data applications and analytics that depend on Cube, potentially causing business operations to halt.
Likely Case
Temporary service disruption until Cube service is restarted, affecting data-driven applications and dashboards.
If Mitigated
Minimal impact with proper rate limiting, request validation, and monitoring in place to detect and block malicious requests.
🎯 Exploit Status
The advisory suggests a specially crafted request can trigger the vulnerability, indicating relatively simple exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.5.13 or 1.4.2
Vendor Advisory: https://github.com/cube-js/cube/security/advisories/GHSA-9vph-2hvm-x66g
Restart Required: Yes
Instructions:
1. Stop Cube service. 2. Update Cube to version 1.5.13 or 1.4.2 using npm update or package manager. 3. Restart Cube service.
🔧 Temporary Workarounds
Rate Limiting
allImplement request rate limiting to prevent rapid exploitation attempts
Configure rate limiting in your reverse proxy or load balancer
Request Validation
allAdd input validation at the proxy layer to filter suspicious requests
Configure WAF rules to block malformed requests
🧯 If You Can't Patch
- Implement network segmentation to restrict access to Cube API endpoints
- Deploy Web Application Firewall (WAF) with DoS protection rules
🔍 How to Verify
Check if Vulnerable:
Check Cube version using 'npm list cube-core' or examine package.jsonCheck Version:
npm list cube-core | grep cube-coreVerify Fix Applied:
Verify version is 1.5.13 or 1.4.2 or higher, then test API functionality📡 Detection & Monitoring
Log Indicators:
- Sudden service crashes
- Error logs showing malformed requests
- Increased error rates
Network Indicators:
- Spike in requests to Cube API endpoints
- Unusual request patterns
SIEM Query:
source="cube.log" AND ("crash" OR "error" OR "malformed")