Cloudflare misconfiguration behind recent BGP route leak

BleepingComputer

January 26, 2026 at 5:50 PM

Overview

Cloudflare recently reported a 25-minute incident involving a Border Gateway Protocol (BGP) route leak that impacted IPv6 traffic. During this time, the leak caused significant problems including congestion and packet loss, resulting in an estimated 12 Gbps of dropped traffic. This misconfiguration affected various internet users and services relying on Cloudflare's infrastructure. Such route leaks can disrupt internet connectivity and degrade user experiences, highlighting the importance of proper configuration in network management. The incident serves as a reminder for organizations to regularly review their BGP settings to prevent similar occurrences in the future.

Key Takeaways

Affected Systems: IPv6 traffic managed by Cloudflare
Action Required: Organizations should review and correct their BGP configurations to prevent route leaks.
Timeline: Disclosed on October 2023

Original Article Summary

Cloudflare has shared more details about a recent 25-minute Border Gateway Protocol (BGP) route leak affecting IPv6 traffic, which caused measurable congestion, packet loss, and approximately 12 Gbps of dropped traffic. [...]

Impact

IPv6 traffic managed by Cloudflare

Exploitation Status

No active exploitation has been reported at this time. However, organizations should still apply patches promptly as proof-of-concept code may exist.

Timeline

Disclosed on October 2023

Remediation

Organizations should review and correct their BGP configurations to prevent route leaks.

Additional Information

This threat intelligence is aggregated from trusted cybersecurity sources. For the most up-to-date information, technical details, and official vendor guidance, please refer to the original article linked below.

Read Original Article

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