George Karr
bd28b7ccba
**Related issue:** Resolves #47524 # Checklist for submitter - [x] QA'd all new/changed functionality manually ## Context [CVE-2026-34182](https://nvd.nist.gov/vuln/detail/CVE-2026-34182) (CVSS 9.1, Critical) is an OpenSSL CMS `AuthEnvelopedData` input-validation flaw fixed in `openssl 3.5.7-r0`. The Alpine base image used by `fleetdm/fleet` ships `3.5.6-r0`, which scanners (Aikido, Trivy) flag on our published image. `fleet serve` itself is statically compiled and does not link OpenSSL, so the running process is unaffected — but the package is present in the base image and shows up in customer-side SBOM scans. ## Approach The issue's preferred path is a base-image SHA bump to `alpine:3.23.5`. Docker Hub's latest `3.23.x` tag is still `3.23.4` (pushed 2026-04-15), so that path isn't yet available. Applying the issue's fallback: ```dockerfile RUN apk --no-cache upgrade openssl libcrypto3 libssl3 ``` This pulls the patched `openssl 3.5.7-r0` from the Alpine 3.23 repos at image build time without waiting on a new base tag. Once `alpine:3.23.5` lands we can revert to a clean SHA-pinned `FROM` bump per the pattern in #43671. ## Scope Limited to `tools/fleet-docker/Dockerfile` per the issue's scope guidance. Other Dockerfiles pinned to the same Alpine SHA (loadtest, scep, mdmproxy) are out of scope here. ## Test plan - [ ] CI image build passes. - [ ] Trivy/scanner re-scan of the resulting `fleetdm/fleet` image confirms CVE-2026-34182 is gone and `openssl` reports `3.5.7-r0`. <!-- This is an auto-generated comment: release notes by coderabbit.ai --> ## Summary by CodeRabbit * **Chores** * Updated OpenSSL and related packages in Docker image build configuration to ensure the latest versions are included during image creation. <!-- end of auto-generated comment: release notes by coderabbit.ai -->
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Open-source platform for IT and security teams with thousands of computers. Designed for APIs, GitOps, webhooks, YAML, and humans.
What's it for?
Fleet gives you a single system to secure and maintain all your computing devices over the air. You can do MDM, patch stuff, deploy software, and verify anything, all from one place, across every OS your organization uses.
Fleet works directly with data and events from the native operating system, down to the bare metal. Strong diagnostics let you investigate errors on end-user devices and collect accurate audit evidence in minutes.
Get started
You can try Fleet out for yourself, or grab time with one of the maintainers to chat.
Is it any good?
Fleet is used in production by IT and security teams managing thousands of devices. Many deployments support tens of thousands of hosts, and a few large organizations manage 400,000 or more.
Supported platforms
- Linux (all distros)
- macOS
- Windows
- Chromebooks
- iOS and Android (BYOD or corporate-owned)
- Amazon Web Services (AWS)
- Google Cloud (GCP)
- Azure (Microsoft cloud)
- Data centers
- Containers (kube, etc)
- Linux-based IoT devices
Infrastructure as code
Manage your fleet with GitOps, or use the GUI, REST API, webhook events, and the fleetctl command-line tool.
Linux support
First-class support for all major distros. Linux gets the same attention and visibility as macOS and Windows.
Visibility and compliance
Fleet can report on hundreds of attributes across your devices and ships with CIS benchmarks for macOS and Windows and comprehensive operating system, hardware, and software data. Check out the table reference documentation to see what's available.
Open by design
Fleet is open source and transparent about what it can and can't see. End users can verify exactly how the agent works and what data their company collects. Fleet collects only the data needed to manage and secure devices, not private activity like keystrokes, emails, or webcams.
Good neighbors
Ready-to-use, enterprise-friendly integrations exist for Snowflake, Splunk, GitHub Actions, Vanta, Elastic Jira, Zendesk, and more. Fleet also works with tools such as Munki, Chef, Puppet, Ansible, CrowdStrike, and SentinelOne.
Lighter than air
Fleet is lightweight and modular. You can use it for MDM without using it for security, and vice versa. You can turn off features you are not using.
Free as in free
The free version of Fleet will always be free. Fleet is independently backed and actively maintained with the help of many amazing contributors.
Longevity
The company behind Fleet is founded (and majority-owned) by true believers in open source. The company's business model is influenced by GitLab (NYSE: GTLB), with great investors, happy customers, and the capacity to become profitable at any time.
Fleet Device Management's company handbook is public and open source. You can read about the history of Fleet and our commitment to improving the product.
Chat
The Fleet community is full of kind and helpful people. Whether or not you are a paying customer, if you need help, just reach out.
Contributing 
Contributions are welcome, whether you answer questions on Slack / GitHub / LinkedIn, improve the documentation or website, write a tutorial, give a talk at a conference or local meetup, give an interview on a podcast, troubleshoot reported issues, or submit a patch. The Fleet code of conduct is on GitHub.
License
The free version of Fleet is available under the MIT license. The commercial license is also designed to allow contributions to paid features for users whose employment agreements allow them to contribute to open source projects. (See LICENSE.md for details.)
Fleet is built on osquery, nanoMDM, Nudge, and swiftDialog.