# Salesforce: Service Disruption: Core Service

> Salesforce reported a major Core Service disruption affecting 15 instances, preventing users from logging in and opening their orgs. It started at 2026-10-23 01:25 UTC and was resolved at 2026-10-23 06:30 UTC, lasting 5 h 5 min. Salesforce attributed failed login-session creation to a recent release

Canonical: https://rewindex.com/company/salesforce/incidents/20004521
Last updated: 2026-10-23T06:46:57Z

- Impact (vendor’s label): major
- Status: resolved
- Started: 2026-10-23 01:25 UTC · Resolved: 2026-10-23 06:30 UTC · Duration: 5.1 h
- Updates: 1 · Affected components: Core Service, 15 instances
- [Vendor status page: https://status.salesforce.com/incidents/20004521](https://status.salesforce.com/incidents/20004521)
- [Company: Salesforce](https://rewindex.com/company/salesforce.md)

## Summary

Salesforce reported a major Core Service disruption affecting 15 instances, preventing users from logging in and opening their orgs. It started at 2026-10-23 01:25 UTC and was resolved at 2026-10-23 06:30 UTC, lasting 5 h 5 min. Salesforce attributed failed login-session creation to a recent release and restored access with a fix forward. _(machine-written, sol)_
## Timeline of updates

- **update** 2026-10-23 06:46 UTC: We have resolved an issue that prevented users from logging in. We identified an issue with a recent release that prevented login sessions from being created. We deployed a fix forward, and access is now restored. Users can log in and open their orgs again. We apologize for how this incident affected you and your business. We will undertake a full investigation of the incident, establishing the technical trigger, the underlying cause, and preventive action to avoid a repeat in the future.

## Rewindex changes for this incident

- 2026-10-23 01:25 UTC: [Major incident: Service Disruption: Core Service](https://rewindex.com/change/i146f4e481613e7.md)

## Cite this

Status incident (vendor impact label: major) posted by Salesforce, started 2026-10-23 01:25 UTC, resolved after 5.1 h, 1 update(s).

- Canonical URL: https://rewindex.com/company/salesforce/incidents/20004521
- Citation: Salesforce, “Service Disruption: Core Service” (2026-10-23 01:25 UTC). Archived by Rewindex: https://rewindex.com/company/salesforce/incidents/20004521 (CC BY 4.0).
- Markdown link: `[Salesforce: Service Disruption: Core Service (2026-10-23)](https://rewindex.com/company/salesforce/incidents/20004521)`


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Canonical: https://rewindex.com/company/salesforce/incidents/20004521 · Markdown: https://rewindex.com/company/salesforce/incidents/20004521.md · JSON: https://rewindex.com/api/v1/companies/salesforce/incidents/20004521 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-11-05T15:58:57.462Z