Doctissimo, Marmiton, ChatGPT… Many websites were inaccessible after an outage with the Cloudflare operator

Cloudflare provides IT services to millions of websites worldwide.

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Tech giant Cloudflare falls victim to a bug impacting the global web, November 18, 2025. (NIKOLAS KOKOVLIS / NURPHOTO / AFP)

Tech giant Cloudflare fell victim to a bug that impacted the global web on November 18, 2025. (NIKOLAS KOKOVLIS / NURPHOTO / AFP)

Network X, Feedly, Marmiton, Doctissimo and many others become inaccessible. After a bug in Amazon’s cloud services crippled many websites in mid-October, it was IT services giant Cloudflare that experienced an unexpected bug that made many websites inaccessible on Tuesday 18 November.

On its status page, Cloudflare announced at 12:48 p.m. (Paris Time) “get information about, and investigate, issues affecting many customers”without stating the cause. At 13:21. (French time), the company said “seeing some recovery in service, but customers may continue to see higher than normal error rates while we continue our improvement efforts”and restored other functions around 2:13 p.m.

To franceinfo, Cloudflare explained that this was indeed the case “noticing an unusual spike in traffic” to one of its services around 12:20 p.m. French time, which caused the error. “We do not yet know the cause of this unusual increase in traffic”added the company, which confirmed “fully mobilized so that traffic flows without error” before finding out the cause of this bug.

Cloudflare is an IT services company that offers services to optimize website performance or protect against cyberattacks, among other things. He explains the site’s answers “meeting the internet needs of millions of websites and processing an average of 81 million HTTP requests per second”.