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DOC-3526: CSS custom property names and color values in the style attribute were lowercased when parsed #4186

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DOC-3526: CSS custom property names and color values in the style attribute were lowercased when parsed #4186

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Docs: DOC-3526 - CSS custom property names and color values in the st…
kemister85 Jun 8, 2026
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Docs: DOC-3526 - Align TINY-11524 entry with updated JIRA documentati…
kemister85 Jun 8, 2026
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7 changes: 7 additions & 0 deletions modules/ROOT/pages/8.7.0-release-notes.adoc
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Expand Up @@ -94,6 +94,13 @@ The following premium plugin updates were released alongside {productname} {rele

// CCFR here.

=== CSS custom property names and color values in the style attribute were lowercased when parsed
// #TINY-11524

Previously, the {productname} style parser lowercased CSS custom property names (such as `--MyColor`) and `color` and `background-color` values when reading the `style` attribute. This altered case-sensitive values, including CSS custom properties, template placeholders such as `{{FooBar}}`, and hex colors such as `#AABBCC`, so the affected styling sometimes did not render as authored.

In {productname} {release-version}, the style parser preserves the original case of CSS custom property names and `color` and `background-color` values. Standard property names are still lowercased, and other processing, such as RGB-to-hex conversion, shorthand merging, and security filtering, is unchanged. Case-sensitive colors and custom properties now stay exactly as authored.


[[security-fixes]]
== Security fixes
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