Downrightnow
// Incident Post-MortemDRN-D20027DD

Vercel outage on May 21, 2026

Minor severityResolved6h 2mCloud
Started · UTC
May 21, 03:01 PM
37h ago
Resolved · UTC
May 21, 09:03 PM
31h ago
Duration
6h 2m
End-to-end
Peak confidence
45.00
177 snapshots
// User impact

Vercel users likely saw failed connections, degraded availability, or session instability for this Cloud service. The incident reached Minor severity and lasted 6h 2m. The stored report window does not show a preserved user-report spike.

// What happened

Vercel's official status page is reporting a minor incident of Elevated Build Errors. Downrightnow's checks show that DNS is resolving normally and user reports remain quiet, suggesting the impact is limited specifically to the build pipeline rather than a broad platform outage.

Cached · Thu, May 21, 2026, 09:04 PM UTC · scope: this incident

// Timeline
  1. Status changed to Operational

    The stored readout moved to Operational with confidence 80.00.

  2. Incident detected

    Minor confidence crossed the incident threshold for Vercel: elevated Build Errors.

  3. Peak confidence reached

    Confidence peaked at 80.00 while the service was marked Operational.

  4. Status changed to Degraded Performance

    The stored readout moved to Degraded Performance with confidence 38.00.

  5. Marked resolved

    The incident was closed after 6h 2m of observed impact.

  6. Status changed to Operational

    The stored readout moved to Operational with confidence 75.00.

// Signals by source0 sources

No per-source signal payloads were preserved in this incident's snapshot window.

// Aggregate evidence

Confidence scoring

45.00

The incident reached 45.00 peak confidence across 177 stored status snapshots.

User reports

0 / 15m

No elevated user-report volume was preserved in the incident window snapshots.

Status samples

0 affected

The incident row exists, but the bounded snapshot window does not include affected status samples.

Recovery signal

Resolved

Recovery was recorded at Thu, May 21, 2026, 09:03 PM UTC.