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Cloudflare blames today's outage on emergency React2Shell patch

Published:

5 december 2025 om 13:53:26

Alert date:

5 december 2025 om 14:01:40

Source:

bleepingcomputer.com

Click to open the original link from this advisory

Cloudflare experienced a major outage today caused by emergency patching of a critical React remote code execution vulnerability dubbed React2Shell. The vulnerability is actively being exploited in attacks, forcing Cloudflare to implement emergency patches that resulted in service disruption. The incident highlights the challenge of balancing security patching with service availability. React2Shell represents a significant threat to applications using vulnerable React components. Organizations using React-based applications should prioritize patching this vulnerability immediately.

Technical details

Mitigation steps:

Affected products:

React
Cloudflare

Related links:

Related CVE's:

Related threat actors:

IOC's:

This article was created with the assistance of AI technology by Perceptive.

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