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[a11y_assessments] Disabled CheckboxListTile shares mutable state #194905

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flutter/packages
#13177
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[a11y_assessments] Disabled CheckboxListTile shares mutable state#194905
flutter/packages
#13177
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P3Issues that are less important to the Flutter projecta: accessibilityAccessibility, e.g. VoiceOver or TalkBack. (aka a11y)p: material_uimaterial_ui package in flutter/packagespackageflutter/packages repository. See also p: labels.team-accessibilityOwned by Framework Accessibility team (i.e. responsible for accessibility code in flutter/flutter)triaged-accessibilityTriaged by Framework Accessibility team

Description

@kevmoo
kevmoo
opened on Oct 21, 2026

In check_box_list_tile.dart#L41-L59, the /check-box-list-tile use case in a11y_assessments binds its second (enabled: false) CheckboxListTile to the same mutable _checked field as the first enabled tile, so toggling the enabled checkbox also flips the disabled checkbox to checked (SemanticsFlag.isChecked, related to #173056 / b/428818181).

  • Root cause: check_box_list_tile.dart#L50-L59 passes value: _checked and a setState callback to the disabled CheckboxListTile instead of an independent value: false, onChanged: null.
  • Impact: Assistive technologies and automated VPAT assessments inspecting /check-box-list-tile after toggling the first checkbox observe the disabled control unexpectedly transition to isChecked (aria-checked="true" while aria-disabled="true").

Proposed Fix

  • Set value: false and onChanged: null on the disabled CheckboxListTile in packages/material_ui/test_apps/a11y_assessments/lib/use_cases/check_box_list_tile.dart (flutter/packages#13177).

Activity

  1. saurabh-mirajkar
    added
    in triagePresently being triaged by the triage team
    p: material_uimaterial_ui package in flutter/packages
    a: accessibilityAccessibility, e.g. VoiceOver or TalkBack. (aka a11y)
    packageflutter/packages repository. See also p: labels.
    fyi-designFor the attention of Design Languages team
    team-accessibilityOwned by Framework Accessibility team (i.e. responsible for accessibility code in flutter/flutter)
    and removed
    in triagePresently being triaged by the triage team
    on Oct 21, 2026
  2. hannah-hyj
    added
    P3Issues that are less important to the Flutter project
    triaged-accessibilityTriaged by Framework Accessibility team
    on Oct 21, 2026
  3. elliette
    added
    triaged-designTriaged by Design Languages team
    on Oct 27, 2026
  4. flutter-triage-bot
    removed
    fyi-designFor the attention of Design Languages team
    triaged-designTriaged by Design Languages team
    on Oct 27, 2026
  5. auto-submit
    closed this as completedin packages#13177on Oct 27, 2026
  6. auto-submit
    added a commit that references this issue on Oct 27, 2026

    [material_ui] Decouple disabled CheckboxListTile state in a11y_assess…

    d9885d7

  7. github-actions commented on Nov 10, 2026

    @github-actions
    github-actionsBot
    on Nov 10, 2026 – with GitHub Actions

    This thread has been automatically locked since there has not been any recent activity after it was closed. If you are still experiencing a similar issue, please open a new bug, including the output of flutter doctor -v and a minimal reproduction of the issue.

  8. github-actions
    locked as resolved and limited conversation to collaborators on Nov 10, 2026
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    P3Issues that are less important to the Flutter projecta: accessibilityAccessibility, e.g. VoiceOver or TalkBack. (aka a11y)p: material_uimaterial_ui package in flutter/packagespackageflutter/packages repository. See also p: labels.team-accessibilityOwned by Framework Accessibility team (i.e. responsible for accessibility code in flutter/flutter)triaged-accessibilityTriaged by Framework Accessibility team

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