CVE-2025-62878
📋 TL;DR
This CVE allows attackers to manipulate PersistentVolume path patterns to create volumes in arbitrary host node locations, potentially overwriting sensitive files or accessing unauthorized directories. It affects Kubernetes environments where users can create PersistentVolumes, particularly in multi-tenant clusters.
💻 Affected Systems
- Kubernetes
- Kubernetes-based platforms
⚠️ 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
Complete host node compromise leading to data destruction, credential theft, and lateral movement to other cluster components.
Likely Case
Unauthorized access to sensitive host files, potential data exfiltration, and disruption of node operations.
If Mitigated
Limited impact through proper RBAC restrictions and network segmentation, though path traversal risk remains.
🎯 Exploit Status
Exploitation requires authenticated access to Kubernetes API with PersistentVolume creation permissions.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor-specific releases (e.g., Kubernetes 1.30.x+, Rancher, OpenShift specific versions)
Vendor Advisory: https://github.com/advisories/GHSA-jr3w-9vfr-c746
Restart Required: Yes
Instructions:
1. Check your Kubernetes distribution's security advisory. 2. Update to patched version. 3. Restart affected components. 4. Validate fix with test deployments.
🔧 Temporary Workarounds
Restrict PersistentVolume Creation
linuxLimit PersistentVolume creation permissions using RBAC to trusted users only.
kubectl create clusterrole restricted-pv-creator --verb=create --resource=persistentvolumes
kubectl create clusterrolebinding pv-creator-binding --clusterrole=restricted-pv-creator --user=trusted-user
Implement Admission Control
linuxUse validating admission webhooks to restrict pathPattern values in PersistentVolume manifests.
# Implement custom admission controller or use OPA/Gatekeeper policies
🧯 If You Can't Patch
- Implement strict RBAC controls to limit PersistentVolume creation to essential administrators only.
- Deploy network policies to segment Kubernetes API server and monitor for suspicious PersistentVolume creation attempts.
🔍 How to Verify
Check if Vulnerable:
Check if your Kubernetes version is in affected range and test creating a PersistentVolume with manipulated pathPattern.Check Version:
kubectl version --shortVerify Fix Applied:
After patching, attempt to create a PersistentVolume with malicious pathPattern - should be rejected.📡 Detection & Monitoring
Log Indicators:
- Kubernetes API server logs showing PersistentVolume creation with unusual pathPattern values
- Audit logs with persistentvolume create events containing path traversal patterns
Network Indicators:
- Unusual API calls to create PersistentVolumes from non-admin users
- Increased volume creation requests
SIEM Query:
source="kubernetes-api" action="create" resource="persistentvolumes" | search pathPattern="*../*"