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Don't set X-XSS-Protection header - #2979

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pkoenig/xss
Jul 30, 2026
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Don't set X-XSS-Protection header#2979
bulldozer-bot[bot] merged 1 commit into
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pkoenig/xss

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@pkoenig10

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Follow up from #2975.

Browsers removed support for the X-XSS-Protection header a long time ago:

Browser Removal Date
Google Chrome Chrome 78 - October 22, 2019
Microsoft Edge Edge 17 - April 30, 2018
Apple Safari Safari 15.4 - March 14, 2022
Mozilla Firefox Never supported

Per our official browser support policy, we do not support browsers released over two years ago:

We fully support any version of the browsers listed below released within the past year. Older browser versions are partially supported up to the past two years, and browser versions released over two years ago are unsupported.

We are well past the support window for browsers that supported the X-XSS-Protection header. It should be acceptable to simply remove this code.

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changelog-app Bot commented Jul 21, 2026

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Generate changelog in changelog/@unreleased

Type (Select exactly one)

  • Feature (Adding new functionality)
  • Improvement (Improving existing functionality)
  • Fix (Fixing an issue with existing functionality)
  • Break (Creating a new major version by breaking public APIs)
  • Deprecation (Removing functionality in a non-breaking way)
  • Migration (Automatically moving data/functionality to a new system)

Description

Don't set the X-XSS-Protection response header in WebSecurityHandler.

Check the box to generate changelog(s)

  • Generate changelog entry

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changelog-app Bot commented Jul 21, 2026

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Successfully generated changelog entry!

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⏸️ Deprecations

  • Don't set the X-XSS-Protection response header in WebSecurityHandler. (#2979)

@bulldozer-bot
bulldozer-bot Bot merged commit dbe87ec into develop Jul 30, 2026
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bulldozer-bot Bot deleted the pkoenig/xss branch July 30, 2026 15:43
@autorelease3

autorelease3 Bot commented Jul 30, 2026

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Released 8.83.0

This creates a tag and GitHub release. Additional build or deployment steps may still be in progress.

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2 participants