CVE-2025-55191
📋 TL;DR
This CVE describes a race condition vulnerability in Argo CD's repository credentials handler that can cause the server to crash when concurrent operations target the same repository URL. Attackers with valid API tokens and repository permissions can trigger denial-of-service attacks, disrupting GitOps operations. Organizations running affected Argo CD versions are vulnerable.
💻 Affected Systems
- Argo CD
📦 What is this software?
Argo Cd by Argoproj
Argo Cd by Argoproj
Argo Cd by Argoproj
Argo Cd by Argoproj
⚠️ Risk & Real-World Impact
Worst Case
Complete and sustained denial-of-service of Argo CD server, disrupting all GitOps deployments and Kubernetes application management until manual intervention.
Likely Case
Intermittent server crashes causing deployment failures and operational disruption, requiring restarts and potentially causing deployment inconsistencies.
If Mitigated
Limited impact with proper access controls and monitoring, though still vulnerable to authorized users causing disruption.
🎯 Exploit Status
Requires authenticated access with specific permissions and ability to trigger concurrent operations on same repository URL.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.14.20, 3.2.0-rc2, 3.1.8, and 3.0.19
Vendor Advisory: https://github.com/argoproj/argo-cd/security/advisories/GHSA-g88p-r42r-ppp9
Restart Required: No
Instructions:
1. Backup current Argo CD configuration and data. 2. Upgrade to patched version using your deployment method (Helm, kubectl, etc.). 3. Verify upgrade completed successfully. 4. Test repository operations to ensure functionality.
🔧 Temporary Workarounds
Rate Limit Repository Operations
allImplement rate limiting on repository API endpoints to reduce likelihood of triggering race condition
# Configure via API gateway or reverse proxy
# Example nginx rate limiting: limit_req_zone $binary_remote_addr zone=argocd:10m rate=10r/s;
Restrict Repository Permissions
allMinimize number of users with repository create/update/delete permissions
# Review and update RBAC policies
kubectl get rolebindings -n argocd
# Remove unnecessary permissions from roles
🧯 If You Can't Patch
- Implement strict API token management and rotation policies
- Deploy Argo CD behind a WAF with rate limiting and anomaly detection
🔍 How to Verify
Check if Vulnerable:
Check Argo CD version: kubectl get pods -n argocd -l app.kubernetes.io/name=argocd-server -o jsonpath='{.items[0].spec.containers[0].image}'Check Version:
kubectl get pods -n argocd -l app.kubernetes.io/name=argocd-server -o jsonpath='{.items[0].spec.containers[0].image}' | grep -o 'v[0-9.]\+'Verify Fix Applied:
Verify version is 2.14.20+, 3.2.0-rc2+, 3.1.8+, or 3.0.19+ and test concurrent repository operations📡 Detection & Monitoring
Log Indicators:
- Argo CD server panic logs
- Unexpected server restarts
- Multiple concurrent repository operations from same source
Network Indicators:
- Spike in repository API requests
- Repeated authentication attempts to repository endpoints
SIEM Query:
source="argocd" AND ("panic" OR "fatal" OR "crash") AND "repository"