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🟡 Changes recommended
Empty-value handling and mixed reporting modes can silently remove enforced security restrictions.
4 open issues
What changed in this PR
Normalizes Content Security Policy values to address keyword quoting, empty entries, and numeric-key type errors.
Changes:
- Splits configured strings and normalizes header keys.
- Adds regression tests for normalization and sandbox flags.
- Documents the fix in the changelog.
Base branch is unspecified; develop compatibility rules were assumed. Validation used targeted code inspection; automated tests remain for CI.
| File | Description |
|---|---|
| user_guide_src/source/changelogs/v4.7.6.rst | Documents the normalization fix. |
| tests/system/HTTP/ContentSecurityPolicyTest.php | Adds normalization regression tests. |
| system/HTTP/ContentSecurityPolicy.php | Changes option normalization and header generation. |
Review effort: Balanced
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paulbalandan
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ContentSecurityPolicy::addOption()
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| if (in_array($target, ['sandbox', 'frameAncestors'], true) && isset($this->{$target}[''])) { | ||
| $emptyReportOnly = $this->{$target}['']; | ||
|
|
||
| foreach ($this->{$target} as $val => $reportOnly) { | ||
| if ($val !== '' && $reportOnly === $emptyReportOnly) { | ||
| unset($this->{$target}['']); | ||
| break; | ||
| } | ||
| } | ||
| } |
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| if (! in_array($name, ['sandbox', 'frame-ancestors'], true)) { | ||
| return; | ||
| } |
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…tion() - Normalize space-separated and empty strings into array options via stringToOptions() - Cast numeric string array keys back to string to prevent TypeError under strict types - Preserve empty source lists as deny-all directives across all directives - Retain empty markers when other options move between reporting modes - Add comprehensive regression tests for config and runtime directives
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Description
Fixed
ContentSecurityPolicy::addOption()andaddToHeader()converting string values directly into array keys, which created invalid entries for empty strings, prevented keyword quoting for space-separated lists, and caused a fatalTypeErrorin PHP 8 strict mode when numeric strings were converted to integer array keys.Checklist: