# Fleet v4.77.1

- Product: Fleet (https://whatsnew.fyi/product/fleet)
- Vendor: Fleet Device Management
- Date: 2026-01-14
- Version: v4.77.1
- Original notes: https://github.com/fleetdm/fleet/releases/tag/fleet-v4.77.1
- Permalink: https://whatsnew.fyi/product/fleet/releases/v4.77.1

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

---

- **fixed** — Improved SOAP message validation on Windows MDM endpoints
- **changed** — Revised auth requirements for /debug endpoints
- **added** — Added additional validation to URL parameter for MS MDM auth endpoint

###### Bug fixes

- Improved SOAP message validation on Windows MDM endpoints
- Revised auth requirements for /debug endpoints
- Added additional validation to URL parameter for MS MDM auth endpoint


###### Upgrading

Please visit our [update guide](https://fleetdm.com/docs/deploying/upgrading-fleet) for upgrade instructions.

###### Documentation

Documentation for Fleet is available at [fleetdm.com/docs](https://fleetdm.com/docs).

###### Binary Checksum

**SHA256**

```
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4011bb883ff02d53ade40c95f7ad211a6166bf9c46e0dd9dabe583c2de2eb417  fleetctl_v4.77.1_linux_arm64.tar.gz
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c8fad858ed2ed2c2cbc9cf2b4c44aec4783d9344397b1ef1c5175ce97535ffca  fleetctl_v4.77.1_windows_amd64.tar.gz
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2c490a5fa1c5f88146d629ec5fa3fc40370da28d364f5a5337999a001408e443  fleetctl_v4.77.1_windows_arm64.tar.gz
134ea899c02016ad8263ef9293f8bc6d2aa13e0f00c28fdd69ccec3af5618e2e  fleetctl_v4.77.1_windows_arm64.zip
```