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Code Issues 775 Packages Projects Releases 10 Wiki Activity

[PR #28677] Sanitize share markdown rendering to prevent XSS #32135

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opened 2026-02-21 20:50:49 -05:00 by yindo · 0 comments
yindo commented 2026-02-21 20:50:49 -05:00
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Original Pull Request: https://github.com/langgenius/dify/pull/28677

State: closed
Merged: No

Important

  1. Make sure you have read our contribution guidelines
  2. Ensure there is an associated issue and you have been assigned to it
  3. Use the correct syntax to link this PR: Fixes #<issue number>.

Summary

Fixes #28676.

  • Sanitize Markdown content with DOMPurify before rendering to close the share/completion XSS vector.
  • Replace the share result dangerouslySetInnerHTML with the shared Markdown renderer so responses always go through the sanitizer.
  • Add a unit test covering removal of event handlers/scripts and javascript: protocols from raw HTML blocks.

Screenshots

Before After
N/A N/A

Checklist

  • This change requires a documentation update, included: Dify Document
  • I understand that this PR may be closed in case there was no previous discussion or issues. (This doesn't apply to typos!)
  • I've added a test for each change that was introduced, and I tried as much as possible to make a single atomic change.
  • I've updated the documentation accordingly.
  • I ran dev/reformat(backend) and cd web && npx lint-staged(frontend) to appease the lint gods
**Original Pull Request:** https://github.com/langgenius/dify/pull/28677 **State:** closed **Merged:** No --- > [!IMPORTANT] > > 1. Make sure you have read our [contribution guidelines](https://github.com/langgenius/dify/blob/main/CONTRIBUTING.md) > 1. Ensure there is an associated issue and you have been assigned to it > 1. Use the correct syntax to link this PR: `Fixes #<issue number>`. ## Summary Fixes #28676. - Sanitize Markdown content with DOMPurify before rendering to close the share/completion XSS vector. - Replace the share result `dangerouslySetInnerHTML` with the shared Markdown renderer so responses always go through the sanitizer. - Add a unit test covering removal of event handlers/scripts and javascript: protocols from raw HTML blocks. ## Screenshots | Before | After | |--------|-------| | N/A | N/A | ## Checklist - [ ] This change requires a documentation update, included: [Dify Document](https://github.com/langgenius/dify-docs) - [x] I understand that this PR may be closed in case there was no previous discussion or issues. (This doesn't apply to typos!) - [x] I've added a test for each change that was introduced, and I tried as much as possible to make a single atomic change. - [ ] I've updated the documentation accordingly. - [x] I ran `dev/reformat`(backend) and `cd web && npx lint-staged`(frontend) to appease the lint gods
yindo added the pull-request label 2026-02-21 20:50:49 -05:00
yindo closed this issue 2026-02-21 20:50:49 -05:00
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Reference: langgenius/dify#32135
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