SECURITY.md

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# Security Policy

## Supported versions

Security fixes are released for the [latest release](https://github.com/ku9nov/faynoSync/releases/latest) only. Check that the issue reproduces on it before reporting.

## Reporting a vulnerability

Do not open a public issue, pull request, or discussion for a security problem.

Report it privately through GitHub: open the [Security tab](https://github.com/ku9nov/faynoSync/security) and click **Report a vulnerability**, or go directly to <https://github.com/ku9nov/faynoSync/security/advisories/new>.

Please include:

- the affected version or commit
- the component (API, dashboard, TUF metadata, storage, updater feeds)
- steps to reproduce or a proof of concept
- the impact you expect

## What to expect

- An initial response within 14 days.
- An assessment and, if confirmed, a fix plan. Progress is shared in the private advisory.
- Once a fix is released, a GitHub Security Advisory is published (with a CVE when applicable) and the fix is listed in the `### Security` section of [CHANGELOG.md](CHANGELOG.md).
- Credit in the advisory, unless you ask to stay anonymous.

## Verifying releases

Release binaries carry a SLSA build provenance attestation signed with Sigstore by the release workflow. Verify a downloaded archive with the [GitHub CLI](https://cli.github.com/):

```shell
gh attestation verify faynoSync_<version>_linux_amd64.tar.gz --repo ku9nov/faynoSync \
  --signer-workflow ku9nov/faynoSync/.github/workflows/create-release.yml
```

`--signer-workflow` accepts only attestations produced by the release workflow, not by any other workflow in the repository.

The same attestation is attached to the release as `faynoSync_<version>.sigstore.json`. For offline verification, save the Sigstore trusted root while online and pass both files:

```shell
gh attestation trusted-root > trusted_root.jsonl
gh attestation verify faynoSync_<version>_linux_amd64.tar.gz --repo ku9nov/faynoSync \
  --signer-workflow ku9nov/faynoSync/.github/workflows/create-release.yml \
  --bundle faynoSync_<version>.sigstore.json --custom-trusted-root trusted_root.jsonl
```

## Scope

In scope: the faynoSync server, the embedded dashboard, TUF metadata handling, release binaries, and the `ku9nov/faynosync` Docker image.

Out of scope: vulnerabilities in your own deployment configuration (reverse proxy, storage bucket policies, leaked credentials), and third-party updaters or SDKs that are not part of this repository.