Tailscale experienced a minor incident on August 17, 2026 affecting Certificates, lasting —. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- investigating Aug 10, 2026, 04:10 PM UTC
Status: Investigating We are investigating a problem which is causing problems with issuing new certificates for MagicDNS hostnames. This problem affects manual certificate issuance and the deployment of new services through Tailscale Serve or Tailscale Funnel. Existing certificates and services currently exposed by Serve or Funnel will remain unaffected as long as the current certificates stay valid. Affected components Certificates (Degraded performance)
- identified Aug 10, 2026, 05:19 PM UTC
Status: Identified We have identified the problem and are rolling out a fix. Affected components Certificates (Degraded performance)
- monitoring Aug 10, 2026, 06:29 PM UTC
Status: Monitoring A fix has been deployed and we are monitoring for any further problems. Affected components Certificates (Operational)
- resolved Aug 11, 2026, 12:42 AM UTC
Status: Resolved This incident has been resolved. Affected components Certificates (Operational)
- investigating Aug 11, 2026, 12:30 PM UTC
Status: Investigating We are investigating problems with issuing new certificates for MagicDNS hostnames. This problem affects manual certificate issuance and the deployment of new services through Tailscale Serve or Tailscale Funnel. Existing certificates and services currently exposed by Serve or Funnel will remain unaffected as long as the current certificates stay valid. Affected components Certificates (Degraded performance)
- identified Aug 11, 2026, 04:28 PM UTC
Status: Identified We have identified the problem and are rolling out a fix. Affected components Certificates (Degraded performance)
- monitoring Aug 12, 2026, 09:30 AM UTC
Status: Monitoring A fix has been deployed and we are monitoring for any further problems. Affected components Certificates (Operational)
- investigating Aug 12, 2026, 01:25 PM UTC
Status: Investigating We are investigating a problem which is causing problems with issuing new certificates for MagicDNS hostnames. This problem affects manual certificate issuance and the deployment of new services through Tailscale Serve or Tailscale Funnel. Existing certificates and services currently exposed by Serve or Funnel will remain unaffected as long as the current certificates stay valid. Affected components Certificates (Degraded performance)
- monitoring Aug 13, 2026, 05:18 PM UTC
Status: Monitoring We have identified the problem, and a fix has been deployed. We are monitoring for any further problems. Affected components Certificates (Operational)
- resolved Aug 17, 2026, 01:00 PM UTC
Status: Resolved There have been no further problems, and the incident has been resolved. Affected components Certificates (Operational)