2025年11月18日，全球互聯網用戶經歷一場大規模服務中斷事件，原因是知名網絡基礎設施公司Cloudflare突發故障，導致約20%的網站無法正常訪問。本次故障波及範圍廣泛，包括馬斯克旗下社交平台X（前推特）、OpenAI的ChatGPT以及其他大量依賴Cloudflare的網站與線上服務，用戶打開網站時普遍遇到無法連接或頁面加載失敗的情況。

事件發生當晚，許多用戶在社交媒體上反映X平台無法刷新內容、登錄失敗，ChatGPT等服務亦出現無法使用的情況。大量網民前往投訴平台表達不滿，短時間內相關投訴數量突破萬條，顯示此次事件影響用戶範圍之廣和反響之強烈。當用戶試圖搜尋更多消息或訪問其他網站時，許多網站同樣出現伺服器錯誤提示，證實故障影響遍及全球。

Cloudflare官方已確認此次問題，並表示正在積極調查原因，將在掌握更多信息後提供進一步說明。同時，Cloudflare否認此前部分媒體報導中所稱的“網絡攻擊”是導致故障的原因。雖然有些報導指出Cloudflare故障導致全球近一半網站瘫痪，但官方數據顯示，約20%的互聯網流量依賴Cloudflare服務，因此故障影響的比例被部分媒體誇大。

此次事件凸顯當前互聯網基礎設施高度集中化和依賴單一服務提供商的風險，一旦核心服務出現故障，將直接影響全球大量網站和線上平台的正常運行，對企業運營和用戶使用體驗造成廣泛影響。Cloudflare的快速響應和後續說明也被認為對恢復用戶信心至關重要。

On November 18, 2025, a major global internet outage occurred due to an unexpected failure at Cloudflare, a prominent web infrastructure company, causing approximately 20% of websites to become inaccessible. The outage affected a wide range of services worldwide, including Elon Musk’s social media platform X (formerly Twitter), OpenAI’s ChatGPT, and numerous other sites and online services that rely on Cloudflare, leaving users unable to connect or load webpages.

During the evening of the incident, many X users reported being unable to refresh feeds or log in, while ChatGPT and other services were similarly disrupted. Complaints quickly surged, with thousands of users expressing frustration online, highlighting the widespread impact of the outage. Attempts to access other websites or search for updates also resulted in server error messages, confirming that the disruption was global in scope.

Cloudflare officially acknowledged the issue and stated that an investigation was underway, promising to provide further updates as more information became available. The company denied earlier media reports suggesting that the outage was caused by a cyberattack. While some media outlets claimed that nearly half of the world’s websites were affected, Cloudflare clarified that roughly 20% of internet traffic depends on its services, indicating that the actual proportion of affected sites was smaller than some reports suggested.

This incident underscored the risks associated with the concentration of internet infrastructure and reliance on a single service provider. When a core service experiences a failure, it can immediately disrupt the operations of countless websites and online platforms, affecting both businesses and users worldwide. Cloudflare’s rapid response and ongoing updates are considered crucial in restoring user confidence and mitigating the broader impact of the outage.