# Salesforce: Major incident: 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/change/i146f4e481613e7
Last updated: 2026-10-23T07:03:00Z

**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)_
- Kind: Major incident · Label: outage (model (Jev))
- Changed: 2026-10-23 01:25 UTC · Detected: 2026-10-23 07:03 UTC
- [Source: https://status.salesforce.com/incidents/20004521](https://status.salesforce.com/incidents/20004521)
- [Company: Salesforce](https://rewindex.com/company/salesforce.md)
- Versions: before (none: first archived) → after incident\_version:130/20004521@bd015b96c508
- Change 1 of 1 for this incident

Incident page (full timeline): [Service Disruption: Core Service](https://rewindex.com/company/salesforce/incidents/20004521.md)
## What changed

**1. Added: Title**

```diff
+ Service Disruption: Core Service
```

**2. Added: Impact**

```diff
+ major
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2026-10-23 01:25 UTC
```

**5. Added: Resolved time**

```diff
+ 2026-10-23 06:30 UTC
```

**6. Added: Affected components**

```diff
+ 15 instances, Core Service
```

**7. Added: Update** (update) · 2026-10-23 06:46 UTC

```diff
+ 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.
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2026-10-23 01:25 UTC | Major incident: Service Disruption: Core Service (this change) | outage |

All Salesforce changes: [timeline](https://rewindex.com/company/salesforce/changes.md)
_Diff excerpts are shown on normalized text: dates, counters and tokens appear as ‹date›, ‹count›, ‹tok›; noise-only edits are hidden. Rewindex shows the changed passages, not a copy of the page._

## Cite this

Major incident: Service Disruption: Core Service on Salesforce’s status page, changed 2026-10-23 01:25 UTC (change 1 of 1).

- Canonical URL: https://rewindex.com/change/i146f4e481613e7
- Citation: Salesforce, “Major incident: Service Disruption: Core Service” (2026-10-23 01:25 UTC). Archived by Rewindex: https://rewindex.com/change/i146f4e481613e7 (CC BY 4.0).
- Markdown link: `[Salesforce: Major incident: Service Disruption: Core Service (2026-10-23)](https://rewindex.com/change/i146f4e481613e7)`


---
Canonical: https://rewindex.com/change/i146f4e481613e7 · Markdown: https://rewindex.com/change/i146f4e481613e7.md · JSON: https://rewindex.com/api/v1/changes/i146f4e481613e7 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-11-05T15:56:18.663Z