For several hours Tuesday, a significant portion of the internet was unavailable in Cloudflare's worst outage since 2019.

A number of high-profile websites, including X and ChatGPT, went down for many on Tuesday, due to problems affecting major internet infrastructure firm, Cloudflare. Thousands of users began reporting issues with the sites, as well as other services, to outage monitoring site Downdetector shortly after 11:30 GMT.

Cloudflare said on Tuesday morning that it was "all hands on deck" trying to work out the cause of the outage.

Cloudflare experienced a "spike in unusual traffic” shortly before errors broke out across many major websites it serves, the internet infrastructure company told Newsweek. Read the full story here.

Web services company Cloudflare said it is aware of problems impacting "multiple customers" amid reports of outages at apps including X.

Cloudflare’s bot management system classifies bots as good or bad with “a machine learning model that we use to generate bot scores for every request traversing our network,” Prince wrote. “Our customers use bot scores to control which bots are allowed to access their sites—or not.”

Cloudflare stock closed the Nov. 18 trading session 2.83% lower at $196.53. The outage exacerbated the ongoing sell-off of the stock, and the closing price is 22.4% lower than the stock's peak closing price of $253.30 on October 31.

Cloudflare co-founder and CEO Matthew Prince apologised in the post late Tuesday, stating that this outage was the worst the company has experienced since 2019.

Infrastructure company Cloudflare has been hit with what it calls "widespread 500 errors, [with] Dashboard and API also failing."

Investigating - Cloudflare is aware of, and investigating an issue which potentially impacts multiple customers. Further detail will be provided as more information becomes available.

Cloudflare (NET) continued losses for seven straight sessions as the stock closed 0.17% lower at $196.20 on Wednesday. The internet security company lost nearly 16.35% in the last six trading sessions.