Stytch - SAML SSO requests failing – Incident details

All systems operational

SAML SSO requests failing

Resolved
Degraded performance
Started about 2 months agoLasted about 2 hours

Affected

Live API

Partial outage from 4:29 PM to 6:01 PM

Test API

Partial outage from 4:29 PM to 6:01 PM

Javascript SDK

Operational from 4:29 PM to 6:01 PM

Updates
  • Postmortem
    Postmortem

    Issue

    All SAML SSO Logins failed in the Stytch Platform.

    Timeline

    October 20th, 2025

    16:30 - 18:01 UTC

    Cause

    A widespread outage in AWS created a knock-on effect that uncovered a latent certificate management issue within the Stytch SSO service. Other Stytch services, like the core Authentication API, responded appropriately in the face of downtime and continued to operate as expected. The result was that all SAML SSO login attempts during this incident returned an invalid certificate error and prevented users from logging in.

    Remediation

    Stytch updated the SSO service to handle certificate management so that it aligns with our other services that did not error. This reconfiguration will prevent this error from recurring in the event of AWS failure again in the future.

  • Resolved
    Resolved

    This incident has been resolved.

  • Investigating
    Investigating

    SAML SSO requests are currently failing as a downstream affect of the AWS outage. We're currently investigating ways to mitigate the issue.