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Cloudflare incident on November 14, 2024, resulting in lost logs

ID: 00159b58-2bc2-5af0-b3cd-c688120f7cbc

STIX ID: report--00159b58-2bc2-5af0-b3cd-c688120f7cbc

Feed Name: Cloudflare Blog

Date Published: 2024-11-26

Date Updated: 2026-04-27

Author: Jamie Herre

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**Cloudflare** reported a November 14, 2024 incident where a misconfiguration triggered a fail-open in Logfwdr, massively increasing buffers in Buftee (up to ~40 million) and causing a cascading overload that led to the loss of about 55% of customer logs over roughly 3.5 hours. The team reverted the bad change within five minutes but required full resets to recover due to unconfigured safeguards; planned remediations include fixing the triggering bug, adding alerts, and instituting regular overload testing to ensure systems fail gracefully.

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