# Salesforce: Service Disruption: Core Service

> Salesforce reported a major Core Service disruption affecting 35 instances that prevented login sessions from being created, blocking users from logging in and opening their orgs. It lasted 4 h 45 min, from 2026-10-23 01:25 UTC to 2026-10-23 06:10 UTC. Salesforce identified an issue with a recent re

Canonical: https://rewindex.com/company/salesforce/incidents/20004520
Last updated: 2026-10-23T06:35:15Z

- Impact (vendor’s label): major
- Status: resolved
- Started: 2026-10-23 01:25 UTC · Resolved: 2026-10-23 06:10 UTC · Duration: 4.8 h
- Updates: 1 · Affected components: Core Service, 35 instances
- [Vendor status page: https://status.salesforce.com/incidents/20004520](https://status.salesforce.com/incidents/20004520)
- [Company: Salesforce](https://rewindex.com/company/salesforce.md)

## Summary

Salesforce reported a major Core Service disruption affecting 35 instances that prevented login sessions from being created, blocking users from logging in and opening their orgs. It lasted 4 h 45 min, from 2026-10-23 01:25 UTC to 2026-10-23 06:10 UTC. Salesforce identified an issue with a recent release and deployed a fix forward, restoring access. _(machine-written, sol)_
## Timeline of updates

- **update** 2026-10-23 06:35 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/i769f6739307f23.md)

## Cite this

Status incident (vendor impact label: major) posted by Salesforce, started 2026-10-23 01:25 UTC, resolved after 4.8 h, 1 update(s).

- Canonical URL: https://rewindex.com/company/salesforce/incidents/20004520
- Citation: Salesforce, “Service Disruption: Core Service” (2026-10-23 01:25 UTC). Archived by Rewindex: https://rewindex.com/company/salesforce/incidents/20004520 (CC BY 4.0).
- Markdown link: `[Salesforce: Service Disruption: Core Service (2026-10-23)](https://rewindex.com/company/salesforce/incidents/20004520)`


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Canonical: https://rewindex.com/company/salesforce/incidents/20004520 · Markdown: https://rewindex.com/company/salesforce/incidents/20004520.md · JSON: https://rewindex.com/api/v1/companies/salesforce/incidents/20004520 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-11-05T15:21:57.598Z