Changes / Vercel / Vercel Auth login failures for pages with Deployment Protection enabled

Vercel: Major incident: Vercel Auth login failures for pages with Deployment Protection enabled

Summary

Vercel Auth logins failed for pages with Deployment Protection enabled in a major-impact incident affecting Routing Middleware. It started at 2026-10-06 16:10 UTC and was resolved at 2026-10-06 16:26 UTC, lasting 15 min; Vercel reported implementing a fix.

Machine-written from the diff below (Sol; type: incident outage). Check the diff before relying on it.

Major incidentLabel: outage (model (Jev), 100%)Changed Detected Source: stspg.io

What changed

AddedTitle#1
Before: not present
After: Vercel Auth login failures for pages with Deployment Protection enabled
AddedImpact#2
Before: not present
After: major
AddedStatus#3
Before: not present
After: resolved
AddedStart time#4
Before: not present
After: 2026-10-06 16:10 UTC
AddedResolved time#5
Before: not present
After: 2026-10-06 16:26 UTC
AddedAffected components#6
Before: not present
After: Routing Middleware
AddedUpdateinvestigating#7
Before: not present
After: We are investigating an issue causing Vercel Auth login failures for pages with Deployment Protection enabled. We will provide an update as more information becomes available.
AddedUpdateidentified#8
Before: not present
After: The issue has been identified and a fix is being implemented.
AddedUpdatemonitoring#9
Before: not present
After: A fix has been implemented and we are monitoring the results.
AddedUpdateresolved#10
Before: not present
After: This incident has been resolved.

First version of this incident archived by Rewindex. View the live incident.

History of this incident

When (UTC)ChangeKind
Major incident: Vercel Auth login failures for pages with Deployment Protection enabled (this change)
Vercel Auth logins failed for pages with Deployment Protection enabled in a major-impact incident affecting Routing Middleware. It started at 2026-10-06 16:10 UTC and was resolved at 2026-10-06 16:26 UTC, lasting 15 min; Vercel reported implementing a fix.
Major incident

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