Klaviyo incident

Cloudflare incident disrupting onsite events

Resolved after 5 hours 7 minutes, affecting Server-side and Lists and 1 more, on November 18, 2025.

resolved Nov 18, 2025, 07:06 PM UTC

This incident has been resolved, as of 2 pm US eastern. All affected components are operational.

Started
Nov 18, 2025, 01:58 PM UTC
Resolved
Nov 18, 2025, 07:06 PM UTC
Duration
5h 7m
Detected by Pingoru
Nov 18, 2025, 01:58 PM UTC

Affected components

Server-sideListsSign-up FormsConsent Pages

Update timeline

  1. identified Nov 18, 2025, 01:58 PM UTC

    Cloudflare declared an incident around 6:30 am US Eastern causing all onsite activities, such as unsubscribe and subscribe preference pages and onsite form submissions to error out. Forms appear, but no requests or related events or subscriptions are processing. API calls are also experiencing 403s. https://www.cloudflarestatus.com/incidents/8gmgl950y3h7 We're currently investigating mitigation steps for the affected features.

  2. monitoring Nov 18, 2025, 02:34 PM UTC

    Fixes have been implemented for some services and we are monitoring the issues.

  3. resolved Nov 18, 2025, 07:06 PM UTC

    This incident has been resolved, as of 2 pm US eastern. All affected components are operational.

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