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Add CSPHeaderEvent, CSP hash-reporting sources and Hash block tags #4

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Add CSPHeaderEvent, CSP hash-reporting sources and Hash block tags #4

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324398a
Preset hardening
aubes May 6, 2026
a1e09f7
Add CSPHeaderEvent, csp_script_hash and csp_style_hash
aubes May 6, 2026
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21 changes: 21 additions & 0 deletions CHANGELOG.md
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Expand Up @@ -5,6 +5,25 @@ All notable changes to this project will be documented in this file.
The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).

## [Unreleased]

## [2.1.0]

### Changed

- **`strict` preset**: added `'unsafe-inline'` and `https:` as CSP Level 1/2 fallbacks alongside `'strict-dynamic'` (modern browsers ignore them when `'strict-dynamic'` is set), and added `form-action 'self'`.
- **`permissive` preset**: added `'unsafe-eval'` to `script-src` (most legacy apps that need `unsafe-inline` also need `eval`), `connect-src 'self' https:` for XHR/fetch/WebSocket calls, and `form-action 'self'`.

### Fixed

- `csp:check` no longer reports `'unsafe-inline'` as an error when `'strict-dynamic'` is present in the same directive (CSP Level 3 browsers ignore `'unsafe-inline'` in that case, so it's a CSP1/2 fallback, not a vulnerability).

### Added

- **`CSPHeaderEvent`**: dispatched on every response after active groups are resolved and before headers are rendered. Listeners can mutate the active `CSPPolicy` instances to apply cross-cutting changes. See `docs/advanced.md#cspheaderevent`.
- **CSP Level 3 hash-reporting sources**: `'report-sha256'`, `'report-sha384'`, `'report-sha512'` added to the `CSPSource` enum. Use them in `script-src` / `style-src` to ask browsers to include the SHA hash of the blocked resource in violation reports (useful for iterating a `strict-dynamic` policy).
- **Hash block tags**: `{% csp_script_hash %}...{% end_csp_script_hash %}` and `{% csp_style_hash %}...{% end_csp_style_hash %}` capture the inline content, compute its sha256 hash, and add it to the corresponding directive. No `nonce` attribute on the rendered tag, so the page stays cache-friendly. See `docs/twig.md#hash-block-tags`.

## [2.0.0]

### Breaking changes
Expand Down Expand Up @@ -49,4 +68,6 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0

- `symfony/twig-bundle` is now optional: install it explicitly if you use nonce/hash Twig helpers

[Unreleased]: https://github.com/aubes/csp-bundle/compare/v2.1.0...HEAD
[2.1.0]: https://github.com/aubes/csp-bundle/compare/v2.0.0...v2.1.0
[2.0.0]: https://github.com/aubes/csp-bundle/compare/v1.0.0...v2.0.0
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