# Vercel: SAML Single Sign-On (SSO) errors

- Impact (vendor’s label): major
- Status: resolved
- Started: 2026-07-16 08:39 UTC · Resolved: 2026-07-16 10:45 UTC · Duration: 2.1 h
- Updates: 3 · Affected components: SAML Single Sign-On
- [Vendor status page: https://stspg.io/yzqkkrl8lw0m](https://stspg.io/yzqkkrl8lw0m)
- [Company: Vercel](https://rewindex.com/company/vercel.md)

## Summary

Vercel reported a major SAML Single Sign-On outage preventing SAML/SSO login and access to SSO-protected teams through the dashboard and CLI. It started at 2026-07-16 08:39 UTC and resolved at 2026-07-16 10:45 UTC, lasting 2 h 5 min. Vercel identified the root cause and implemented a fix but did not specify either. _(machine-written, sol)_
## Timeline of updates

- **investigating** 2026-07-16 08:39 UTC: We are investigating SAML Single Sign-On (SSO) errors, leading to inability to login using SAML/SSO or access SSO-protected teams through the Vercel dashboard and CLI.
- **monitoring** 2026-07-16 10:23 UTC: The root cause of the SAML Single Sign-On (SSO) errors has been identified and a fix has been implemented. We are seeing error rates decrease. Users should be able to login with SAML/SSO or access their SSO-protected teams through the Vercel dashboard and CLI again. We are continuing to monitor.
- **resolved** 2026-07-16 10:45 UTC: This incident has been resolved.

## Rewindex changes for this incident

- 2026-07-16 08:39 UTC: [Major incident: SAML Single Sign-On (SSO) errors](https://rewindex.com/change/ib4d04a7a427c06.md)


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Canonical: https://rewindex.com/company/vercel/incidents/nw8xv7ypn7y0 · Markdown: https://rewindex.com/company/vercel/incidents/nw8xv7ypn7y0.md · JSON: https://rewindex.com/api/v1/companies/vercel/incidents/nw8xv7ypn7y0 · Generated 2026-10-18T11:49:17.289Z