Webhook APIs and UI Degraded
May 28, 01:13 UTCMay 28, 01:32 UTC
Duration
19m
Impact
Minor
Root cause
Bug
GitHub, 90 days
68 incidents
Affected
Not listed by the vendor.
Final update
On May 28, 2026, between 00:54 UTC and 01:19 UTC, some users experienced errors when interacting with the Webhooks API, including webhook delivery history and configuration endpoints. On average, the error rate was 0.28% and peaked at 0.45%. This was due to a bug that caused a single Kubernetes pod to enter a CrashLoopBackOff after receiving a 500 with an empty response body from Cosmos DB. We mitigated the incident by restarting the service. To prevent future incidents, we are pushing a change to handle this response scenario from Cosmos DB appropriately.
Timeline
- Resolved · May 28, 01:32 UTC
On May 28, 2026, between 00:54 UTC and 01:19 UTC, some users experienced errors when interacting with the Webhooks API, including webhook delivery history and configuration endpoints. On average, the error rate was 0.28% and peaked at 0.45%. This was due to a bug that caused a single Kubernetes pod to enter a CrashLoopBackOff after receiving a 500 with an empty response body from Cosmos DB. We mitigated the incident by restarting the service. To prevent future incidents, we are pushing a change to handle this response scenario from Cosmos DB appropriately.
More from GitHub
Full history| Started | Incident | Impact | Duration |
|---|---|---|---|
| Sep 2310:11 UTC | Incident across several services | minor | Ongoing |
| Sep 2022:13 UTC | Incident with Pull Requests | minor | 1h 9m |
| Sep 1720:59 UTC | Elevated rate of errors for OpenAI models provided by Copilot | minor | 50m |
| Sep 1607:20 UTC | Degradation with Gemini 3.8 Flash | major | 10h 28m |
| Sep 1519:11 UTC | Disruption with some GitHub services | minor | 49m |
| Sep 1509:47 UTC | Disruption with some GitHub services | minor | 1h 30m |
Also caused by software bug
All| Started | Vendor | Incident | Impact | Duration |
|---|---|---|---|---|
| Sep 1518:57 UTC |  ClickHouse | ClickPipes failing on Kinesis in AWS us-east-1ClickHouse | critical | 29h 46m |
| Sep 318:20 UTC |  Twilio | Retroactive Incident: Twilio Personalized Support Phone Line AffectedTwilio | none | 0m |
| Aug 819:48 UTC |  Grafana Labs | Alerting expressions pipeline failing when recovery settingsGrafana Labs | minor | 0m |
| Jul 2314:14 UTC |  Box | [Medium] Issues with Box HubsBox | major | 16m |
| May 1115:05 UTC |  Upstash | Fly.io Upstash Redis service distruption (FRA region)Upstash | major | 3h 17m |
| May 809:46 UTC | Upstash | QStash US Region Service DisruptionUpstash | critical | 22m |
From vendors' own status pages and disclosures. Times as reported. Logos via logo.dev; trademarks belong to their owners.