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[Android] Refuse external setters of engine entrypoint and cached engine arguments via Intents - #190249
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mboetger
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…ine arguments via `Intent`s (flutter#190249) > [!WARNING] > This is a breaking change. Though the motivation for this change is the security of our users and migration to accommodate this change is critical, I looked at some top plugins that _might_ have been impacted to ensure they won't be broken: All 1P plugins, [`firebase_messaging`](https://pub.dev/packages/firebase_messaging) v16.5.0, [`flutter_local_notifications`](https://pub.dev/packages/flutter_local_notifications) v22.3.0, [`awesome_notifications`](https://pub.dev/packages/awesome_notifications) v0.12.1, [`android_alarm_manager_plus`](https://pub.dev/packages/android_alarm_manager_plus) v5.1.1, [`receive_sharing_intent`](https://pub.dev/packages/receive_sharing_intent) v1.9.0, [`onesignal_flutter`](https://pub.dev/packages/onesignal_flutter), [`workmanager`](https://pub.dev/packages/workmanager) v0.10.7 [`flutter_background_service`](https://pub.dev/packages/flutter_background_service) v5.1.0, [`app_links`](https://pub.dev/packages/app_links) v7.2.1, [`uni_links`](https://pub.dev/packages/uni_links) v0.5.1 Changes the embedding to only allow setting app launch entry-point and cached engine related arguments via `Intent`s in debug/profile mode or when the `Intent` sender is verifiably the app itself. This hardens the embedding against arbitrary argument injection by a malicious actor, preventing unauthorized access to sensitive app routes and engine controls. Below Android 13, it is impossible to verify the `Intent` sender is verifiably the app itself in all cases, so apps/plugins that do not migrate and run on those versions will be impacted. In debug/profile modes, if an unverified `Intent` attempts to set these arguments, the embedding now logs a detailed warning containing the target component, the intent details, and the specific `Intent` extra keys that triggered the verification failure. It also links to the breaking changes migration guide for help on migrating: flutter/website#13645 For deep links, the `Intent` is compared against the app's `Intent` filters to ensure the app should allow that link. This is standard for the OS; see [Android's Intents and Intent Filters documentation](https://developer.android.com/guide/components/intents-filters) for more information on that. Fixes flutter#190452 and fixes flutter#190450. ## Pre-launch Checklist - [x] I read the [Contributor Guide] and followed the process outlined there for submitting PRs. - [x] I read the [AI contribution guidelines] and understand my responsibilities, or I am not using AI tools. - [x] I read the [Tree Hygiene] wiki page, which explains my responsibilities. - [x] I read and followed the [Flutter Style Guide], including [Features we expect every widget to implement]. - [x] I signed the [CLA]. - [x] I listed at least one issue that this PR fixes in the description above. - [x] I updated/added relevant documentation (doc comments with `///`). - [x] I added new tests to check the change I am making, or this PR is [test-exempt]. - [x] I followed the [breaking change policy] and added [Data Driven Fixes] where supported. - [ ] All existing and new tests are passing. If you need help, consider asking for advice on the #hackers-new channel on [Discord]. If this change needs to override an active code freeze, provide a comment explaining why. The code freeze workflow can be overridden by code reviewers. See pinned issues for any active code freezes with guidance. **Note**: The Flutter team is currently trialing the use of [Gemini Code Assist for GitHub](https://developers.google.com/gemini-code-assist/docs/review-github-code). Comments from the `gemini-code-assist` bot should not be taken as authoritative feedback from the Flutter team. If you find its comments useful you can update your code accordingly, but if you are unsure or disagree with the feedback, please feel free to wait for a Flutter team member's review for guidance on which automated comments should be addressed. <!-- Links --> [Contributor Guide]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#overview [AI contribution guidelines]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#ai-contribution-guidelines [Tree Hygiene]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md [test-exempt]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#tests [Flutter Style Guide]: https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md [Features we expect every widget to implement]: https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md#features-we-expect-every-widget-to-implement [CLA]: https://cla.developers.google.com/ [flutter/tests]: https://github.com/flutter/tests [breaking change policy]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#handling-breaking-changes [Discord]: https://github.com/flutter/flutter/blob/main/docs/contributing/Chat.md [Data Driven Fixes]: https://github.com/flutter/flutter/blob/main/docs/contributing/Data-driven-Fixes.md --------- Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>
This was referenced Sep 28, 2026
DanTup
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…ine arguments via `Intent`s (flutter#190249) > [!WARNING] > This is a breaking change. Though the motivation for this change is the security of our users and migration to accommodate this change is critical, I looked at some top plugins that _might_ have been impacted to ensure they won't be broken: All 1P plugins, [`firebase_messaging`](https://pub.dev/packages/firebase_messaging) v16.5.0, [`flutter_local_notifications`](https://pub.dev/packages/flutter_local_notifications) v22.3.0, [`awesome_notifications`](https://pub.dev/packages/awesome_notifications) v0.12.1, [`android_alarm_manager_plus`](https://pub.dev/packages/android_alarm_manager_plus) v5.1.1, [`receive_sharing_intent`](https://pub.dev/packages/receive_sharing_intent) v1.9.0, [`onesignal_flutter`](https://pub.dev/packages/onesignal_flutter), [`workmanager`](https://pub.dev/packages/workmanager) v0.10.7 [`flutter_background_service`](https://pub.dev/packages/flutter_background_service) v5.1.0, [`app_links`](https://pub.dev/packages/app_links) v7.2.1, [`uni_links`](https://pub.dev/packages/uni_links) v0.5.1 Changes the embedding to only allow setting app launch entry-point and cached engine related arguments via `Intent`s in debug/profile mode or when the `Intent` sender is verifiably the app itself. This hardens the embedding against arbitrary argument injection by a malicious actor, preventing unauthorized access to sensitive app routes and engine controls. Below Android 13, it is impossible to verify the `Intent` sender is verifiably the app itself in all cases, so apps/plugins that do not migrate and run on those versions will be impacted. In debug/profile modes, if an unverified `Intent` attempts to set these arguments, the embedding now logs a detailed warning containing the target component, the intent details, and the specific `Intent` extra keys that triggered the verification failure. It also links to the breaking changes migration guide for help on migrating: flutter/website#13645 For deep links, the `Intent` is compared against the app's `Intent` filters to ensure the app should allow that link. This is standard for the OS; see [Android's Intents and Intent Filters documentation](https://developer.android.com/guide/components/intents-filters) for more information on that. Fixes flutter#190452 and fixes flutter#190450. ## Pre-launch Checklist - [x] I read the [Contributor Guide] and followed the process outlined there for submitting PRs. - [x] I read the [AI contribution guidelines] and understand my responsibilities, or I am not using AI tools. - [x] I read the [Tree Hygiene] wiki page, which explains my responsibilities. - [x] I read and followed the [Flutter Style Guide], including [Features we expect every widget to implement]. - [x] I signed the [CLA]. - [x] I listed at least one issue that this PR fixes in the description above. - [x] I updated/added relevant documentation (doc comments with `///`). - [x] I added new tests to check the change I am making, or this PR is [test-exempt]. - [x] I followed the [breaking change policy] and added [Data Driven Fixes] where supported. - [ ] All existing and new tests are passing. If you need help, consider asking for advice on the #hackers-new channel on [Discord]. If this change needs to override an active code freeze, provide a comment explaining why. The code freeze workflow can be overridden by code reviewers. See pinned issues for any active code freezes with guidance. **Note**: The Flutter team is currently trialing the use of [Gemini Code Assist for GitHub](https://developers.google.com/gemini-code-assist/docs/review-github-code). Comments from the `gemini-code-assist` bot should not be taken as authoritative feedback from the Flutter team. If you find its comments useful you can update your code accordingly, but if you are unsure or disagree with the feedback, please feel free to wait for a Flutter team member's review for guidance on which automated comments should be addressed. <!-- Links --> [Contributor Guide]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#overview [AI contribution guidelines]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#ai-contribution-guidelines [Tree Hygiene]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md [test-exempt]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#tests [Flutter Style Guide]: https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md [Features we expect every widget to implement]: https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md#features-we-expect-every-widget-to-implement [CLA]: https://cla.developers.google.com/ [flutter/tests]: https://github.com/flutter/tests [breaking change policy]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#handling-breaking-changes [Discord]: https://github.com/flutter/flutter/blob/main/docs/contributing/Chat.md [Data Driven Fixes]: https://github.com/flutter/flutter/blob/main/docs/contributing/Data-driven-Fixes.md --------- Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>
This was referenced Sep 28, 2026
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…#13060) Manual roll Flutter from 4fcd90be0045 to c5a061b18fa2 (222 revisions) Manual roll requested by [email protected] flutter/flutter@4fcd90b...c5a061b 2026-09-28 [email protected] [cross imports] navigator_test.dart (flutter/flutter#190954) 2026-09-28 [email protected] Revert: Reland: Only render views that need to be rendered (flutter/flutter#193360) 2026-09-28 [email protected] ci(bringup): android_intent_security_test is green (flutter/flutter#193469) 2026-09-28 [email protected] Sync CHANGELOG.md from stable (flutter/flutter#193020) 2026-09-28 [email protected] Roll Fuchsia Linux SDK from ukukV5lEkKabtOATk... to QdgqP02_cYpRQQQNN... (flutter/flutter#193454) 2026-09-28 [email protected] Roll pub packages (flutter/flutter#193460) 2026-09-28 [email protected] Un-nest sceneBuildDuration and windowRenderDuration in web SceneBuilderRecorder (flutter/flutter#193260) 2026-09-28 [email protected] Fix unresolved doc comment references in dev/integration_tests and dev/benchmarks (flutter/flutter#193433) 2026-09-28 [email protected] Roll Packages from e55e7ac to ba0364a (9 revisions) (flutter/flutter#193450) 2026-09-28 [email protected] [tool] Require explicit dependency injection for FlutterDevice and FlutterDevice.create (flutter/flutter#192830) 2026-09-28 [email protected] Roll pub packages (flutter/flutter#193442) 2026-09-28 [email protected] [flutter_tools] Include data assets from hooks when pubspec.yaml is empty (flutter/flutter#193434) 2026-09-28 [email protected] Roll pub packages (flutter/flutter#193438) 2026-09-28 [email protected] Fix unresolved doc comment references in Material and Cupertino (flutter/flutter#193283) 2026-09-28 [email protected] Fix doc references to Material and Cupertino in the widgets library and its tests (flutter/flutter#193334) 2026-09-26 [email protected] wasm: enforce WasmGC opt-in capability checks and Firefox < 147 guard (flutter/flutter#193180) 2026-09-26 [email protected] [Android] Refuse external setters of engine entrypoint and cached engine arguments via `Intent`s (flutter/flutter#190249) 2026-09-26 [email protected] [web] Unskip TextPainter.getWordBoundary test (flutter/flutter#193378) 2026-09-26 [email protected] Specify non-obvious types in pattern variable declarations (flutter/flutter#192632) 2026-09-26 [email protected] Removes feedback loop from advanced filters without offscreen msaa and framebufferfetch (flutter/flutter#193306) 2026-09-26 [email protected] [web] Unskip 8 passing image tests in painting and rendering (flutter/flutter#193377) 2026-09-26 [email protected] Revert: Allow resetting test invariants in `addTearDown` (flutter/flutter#193383) 2026-09-25 [email protected] [tool] Migrate CoverageCollector to modular dependency injection (flutter/flutter#192924) 2026-09-25 [email protected] Fix more unresolved doc comment references (flutter/flutter#193336) 2026-09-25 [email protected] Allow resetting test invariants in `addTearDown` (flutter/flutter#192082) 2026-09-25 [email protected] [a11y] Add a semantics role for slider (flutter/flutter#193324) 2026-09-25 [email protected] Fix plugin tests after Pigeon plugin template changes (flutter/flutter#193302) 2026-09-25 [email protected] [Android 17] Bump Standard Test Apps in flutter/flutter to AGP 9.3.1 (flutter/flutter#193263) 2026-09-25 [email protected] SSBO-based gradients in UberSDF (flutter/flutter#192962) 2026-09-25 [email protected] [Linux] Handle FlView being destroyed before rendering is complete. (flutter/flutter#193268) 2026-09-25 [email protected] [flutter_tools] Handle Windows reserved characters in test target path (flutter/flutter#191900) 2026-09-25 [email protected] docs(tools): nit: say hook/build.dart in CMake native assets comment (flutter/flutter#192205) 2026-09-25 [email protected] [web] Enable Firefox Skwasm UI CI suites, configure COI configs, and fail fast on loader rejections (flutter/flutter#193187) 2026-09-25 [email protected] [Android 17] Bumped Engine Dependencies to 9.3.1 (flutter/flutter#193265) 2026-09-25 [email protected] [web] Omit group role on menu scrollables and assign region role to named routes (flutter/flutter#192965) 2026-09-25 [email protected] Roll Skia from 8eedeed98e79 to f441ca223b2b (5 revisions) (flutter/flutter#193353) 2026-09-25 [email protected] Roll Fuchsia Linux SDK from EbPpoJW-Lnsu-8dyZ... to ukukV5lEkKabtOATk... (flutter/flutter#193326) 2026-09-25 [email protected] Roll Packages from 431ea69 to e55e7ac (6 revisions) (flutter/flutter#193351) 2026-09-25 [email protected] Support DynamicLibrary.codeAsset in Flutter (flutter/flutter#188947) 2026-09-25 [email protected] Roll Dart SDK from 75d9e87d4e3d to 0e7642b85457 (1 revision) (flutter/flutter#193346) 2026-09-25 [email protected] Exclude iOS PRs from macOS link (flutter/flutter#193315) 2026-09-25 [email protected] Roll Skia from 6357608543ec to 8eedeed98e79 (4 revisions) (flutter/flutter#193341) 2026-09-25 [email protected] Roll Dart SDK from d3aedb186aab to 75d9e87d4e3d (3 revisions) (flutter/flutter#193335) 2026-09-25 [email protected] Cache the paint offset adjusted line metrics in TextPainter (flutter/flutter#191223) ...
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… engine `Intent` arguments (#13645) _Description of what this PR is changing or adding, and why:_ Adds breaking change/migration guide for security improvements made to entrypoint and cached engine `Intent` arguments for the Flutter Android embedding. _Issues fixed by this PR (if any):_ flutter/flutter#190452 and flutter/flutter#190450 _PRs or commits this PR depends on (if any):_ flutter/flutter#190249 (merged) ## Presubmit checklist - [x] If you are unwilling, or unable, to sign the CLA, even for a _tiny_, one-word PR, please file an issue instead of a PR. - [x] If this PR is not meant to land until a future stable release, mark it as draft with an explanation. - [x] This PR follows the [Google Developer Documentation Style Guidelines](https://developers.google.com/style)—for example, it doesn't use _i.e._ or _e.g._, and it avoids _I_ and _we_ (first-person pronouns). - [x] This PR uses [semantic line breaks](https://github.com/dart-lang/site-shared/blob/main/doc/writing-for-dart-and-flutter-websites.md#semantic-line-breaks) of 80 characters or fewer.
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Warning
This is a breaking change. Though the motivation for this change is the security of our users and migration to accommodate this change is critical, I looked at some top plugins that might have been impacted to ensure they won't be broken: All 1P plugins,
firebase_messagingv16.5.0,flutter_local_notificationsv22.3.0,awesome_notificationsv0.12.1,android_alarm_manager_plusv5.1.1,receive_sharing_intentv1.9.0,onesignal_flutter,workmanagerv0.10.7flutter_background_servicev5.1.0,app_linksv7.2.1,uni_linksv0.5.1Changes the embedding to only allow setting app launch entry-point and cached engine related arguments via
Intents in debug/profile mode or when theIntentsender is verifiably the app itself. This hardens the embedding against arbitrary argument injection by a malicious actor, preventing unauthorized access to sensitive app routes and engine controls. Below Android 13, it is impossible to verify theIntentsender is verifiably the app itself in all cases, so apps/plugins that do not migrate and run on those versions will be impacted.In debug/profile modes, if an unverified
Intentattempts to set these arguments, the embedding now logs a detailed warning containing the target component, the intent details, and the specificIntentextra keys that triggered the verification failure. It also links to the breaking changes migration guide for help on migrating: flutter/website#13645For deep links, the
Intentis compared against the app'sIntentfilters to ensure the app should allow that link. This is standard for the OS; see Android's Intents and Intent Filters documentation for more information on that.Fixes #190452 and fixes #190450.
Pre-launch Checklist
///).If you need help, consider asking for advice on the #hackers-new channel on Discord.
If this change needs to override an active code freeze, provide a comment explaining why. The code freeze workflow can be overridden by code reviewers. See pinned issues for any active code freezes with guidance.
Note: The Flutter team is currently trialing the use of Gemini Code Assist for GitHub. Comments from the
gemini-code-assistbot should not be taken as authoritative feedback from the Flutter team. If you find its comments useful you can update your code accordingly, but if you are unsure or disagree with the feedback, please feel free to wait for a Flutter team member's review for guidance on which automated comments should be addressed.