Changes / v0 / SAML Single Sign-On (SSO) errors
v0: Major incident: SAML Single Sign-On (SSO) errors
Summary
A major SAML Single Sign-On (SSO) outage prevented login and access to SSO-protected teams through the Vercel dashboard and CLI. It started at 2026-07-16 08:39 UTC and was resolved at 2026-07-16 10:45 UTC, lasting 2 h 5 min. The vendor reported implementing a fix but did not specify the root cause.
Machine-written from the diff below (Sol; type: incident outage). Check the diff before relying on it.
What changed
Before: not present
After: SAML Single Sign-On (SSO) errors
Before: not present
After: major
Before: not present
After: resolved
Before: not present
After: 2026-07-16 08:39 UTC
Before: not present
After: 2026-07-16 10:45 UTC
Before: not present
After: SAML Single Sign-On
Before: not present
After: 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.
Before: not present
After: 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.
Before: not present
After: This incident has been resolved.
First version of this incident archived by Rewindex. View the live incident.
History of this incident
| When (UTC) | Change | Kind |
|---|---|---|
| Major incident: SAML Single Sign-On (SSO) errors (this change) A major SAML Single Sign-On (SSO) outage prevented login and access to SSO-protected teams through the Vercel dashboard and CLI. It started at 2026-07-16 08:39 UTC and was resolved at 2026-07-16 10:45 UTC, lasting 2 h 5 min. The vendor reported implementing a fix but did not specify the root cause. | Major incident |