[RESOLVED] Increased API Error Rates (Oregon)

AWS Health · Resolved

Status

Resolved

Severity

Multiple Services

Started

Sep 03, 2026 21:49 UTC

Resolved

Sep 04, 2026 00:07 UTC

Timeline

Resolved · AWS Health · Sep 04 00:07 UTC

[RESOLVED] Increased API Error Rates

Between 2:12 PM and 3:18 PM PDT, we experienced increased API error rates affecting the STS AssumeRoleWithSAML and AssumeRoleWithWebIdentity APIs in the US-WEST-2 Region. The root cause was determined to be due to an issue with an STS subsystem responsible for communicating with external identity providers. Other AWS Services that rely on these identity federation protocols were also affected. At 3:18 PM, we observed signs of recovery and continued to monitor to ensure stability and full recovery. The issue is resolved and the service is operating normally at this time.

[RESOLVED] Increased API Error Rates (Oregon) →
Investigating · AWS Health · Sep 03 23:20 UTC

Increased API Error Rates

We continue to see recovery holding steady for the STS AssumeRoleWithSAML and AssumeRoleWithWebIdentity APIs in the US-WEST-2 Region. Error rates are now back to pre-event levels, and we continue actively monitoring to confirm full recovery. We will provide another update by 5:15 PM or earlier.

[RESOLVED] Increased API Error Rates (Oregon) →
Investigating · AWS Health · Sep 03 23:20 UTC

Increased API Error Rates

We continue to see recovery holding steady for the STS AssumeRoleWithSAML and AssumeRoleWithWebIdentityAPIs in the US-WEST-2 Region. Error rates are now back to pre-event levels, and we continue actively monitoring to confirm full recovery. We will provide another update by 5:15 PM or earlier.

[RESOLVED] Increased API Error Rates (Oregon) →
Investigating · AWS Health · Sep 03 23:20 UTC

Increased API Error Rates

We continue to see recovery holding steady for the STS AssumeRoleWithSAML and AssumeRoleWithWebIdentityAPIs in the US-WEST-2 Region. Error rates are now back to pre-event levels, and continue actively monitoring to confirm full recovery. We will provide another update by 5:15 PM or earlier.

[RESOLVED] Increased API Error Rates (Oregon) →
Investigating · AWS Health · Sep 03 22:26 UTC

Increased API Error Rates

We are seeing early signs of recovery and continue to monitor for full recovery. We will provide another update at 4:15 PM, or sooner if we have additional information to share.

[RESOLVED] Increased API Error Rates (Oregon) →
Investigating · AWS Health · Sep 03 21:49 UTC

Increased API Error Rates

Starting at 2:12 PM PDT, we began experiencing increased API error rates for STS and Sign In when using SAML in the US-WEST-2 Region. Our engineering team was automatically engaged at 2:19 PM to begin investigating the root cause. There is no work around available at this time. We will provide another update by 3:30 PM PDT.

[RESOLVED] Increased API Error Rates (Oregon) →
Investigating · AWS Health · Sep 03 21:49 UTC

Increased API Error Rates

Starting at 2:12 PM PDT, we began experiencing increased API error rates for STS and Sign In when using SAML. Our engineering team was automatically engaged at 2:19 PM to begin investigating the root cause. There is no work around available at this time. We will provide another update by 3:30 PM PDT.

[RESOLVED] Increased API Error Rates (Oregon) →