Harness outage, 29 September 2026
SSO login failures for the published Harness Okta application
- Started
- Resolved
- 2 Oct 2026, 00:33 UTC (after 2 days)
- Impact
- Not stated
- Affected
- Platform
Last update from Harness
# 1. Summary Starting September 29, 2026, customers who sign in to Harness through the published Harness application in the Okta Integration Network \(OIN\) were unable to complete SP-initiated SSO login. Affected users received an HTTP 400 error from Okta instead of being signed in. The issue was introduced by a change in how Okta validated the requested reply \(ACS\) URL for existing installations of the published Harness application. Workarounds were published within an hour of the first report, and every affected customer was unblocked. # 2. Impact * Impact was limited to customers using the published Harness application from the Okta Integration Network for SP-initiated login \(s...
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