Elevated 4xx errors on Operator

Major · Started Aug 9, 2026 · 2:56 PM

Duration

20m
Severity

Major
Detection lead

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User reports

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Summary

Elevated 4xx errors on Operator

We have identified the issue to be caused by a bug in Vercel's internal CDN routing. After migrating domains towards the new deployment, Vercel served outdated files via their CDN even after purging the CDN cache.

Started

Aug 9, 2026 · 2:56 PM
Resolved

Aug 9, 2026 · 3:17 PM
Duration

20m
Severity

Major

Event timeline

How this incident unfolded

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Investigating
Aug 9 · 2:56 PM Arexico

We are observing an increase in 4xx error related to the recent deployment of a system update. We are investigating the root cause.
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Resolved
Aug 9 · 3:17 PM Arexico

We have identified the issue to be caused by a bug in Vercel's internal CDN routing. After migrating domains towards the new deployment, Vercel served outdated files via their CDN even after purging the CDN cache.