Let's Encrypt incident

Issuance disruption

Minor Resolved View vendor source →

Let's Encrypt experienced a minor incident on October 20, 2026 affecting acme-v02.api.letsencrypt.org (Production) and acme-staging-v02.api.letsencrypt.org (Staging) and 1 more component, lasting 25m. The incident has been resolved; the full update timeline is below.

Started
Oct 20, 2026, 12:28 AM UTC
Resolved
Oct 20, 2026, 12:54 AM UTC
Duration
25m
Detected by Pingoru
Oct 20, 2026, 12:28 AM UTC

Affected components

acme-v02.api.letsencrypt.org (Production)acme-staging-v02.api.letsencrypt.org (Staging)portal.letsencrypt.org (Production) (High Assurance Datacenter 2)portal-staging.letsencrypt.org (Staging) (High Assurance Datacenter 1)

Update timeline

  1. investigating Oct 20, 2026, 12:28 AM UTC

    We're seeing elevated rates of validation failures that shouldn't be happening. We're investigating, and expect to resolve the issue soon. Back to current status Status History Powered by Status.io Subscribe to receive status updates by email Close Subscribe Manage Subscription Manage Existing Subscription Create New Subscription Subscribe to receive status updates in Microsoft Teams Enter your Microsoft Teams webhook. View Instructions Email address for managing subscription Close Subscribe Manage Subscription Manage Existing Subscription Create New Subscription Subscribe to receive status updates via RSS RSS Feed Close Subscribe to receive status updates in Slack Slack channel ID Find the channel ID: Select the channel in your Slack workspace. The channel ID is displayed in the browser URL. Example: https://app.slack.com/client/T04SJBK1C/ C03SKGJ1P Email address Close Manage Subscription Manage Existing Subscription Create New Subscription Subscribe to receive status updates via iCalendar iCalendar Feed Close

  2. investigating Oct 20, 2026, 12:28 AM UTC

    We're seeing elevated rates of validation failures that shouldn't be happening. We're investigating, and expect to resolve the issue soon.

  3. identified Oct 20, 2026, 12:41 AM UTC

    We've identified the problem that's affecting issuance success rates, and expect to solve it within the next few minutes.

  4. identified Oct 20, 2026, 12:41 AM UTC

    We've identified the problem that's affecting issuance success rates, and expect to solve it within the next few minutes.

  5. resolved Oct 20, 2026, 12:54 AM UTC

    We've resolved the issue that was causing validation failures in the staging and production environments. Issuance is back to normal.