fix: prevent prototype pollution when deleting file inputs - #16218
Merged
Conversation
If a file input of a remote form is deleted, and the path to that file contains things like `__proto__` you can do prototype pollution (you can e.g. delete methods from object prototypes). This fixes that by reusing the same mechanisms we already have in place elsewhere. Big big big edge case + remote functions are experimental, hence no SEV.
|
Install the latest version of pnpm add https://pkg.svelte.dev/@sveltejs/kit/c/42bf3007981dcf240d3c2505779d1efd2fcb2440Open in |
🦋 Changeset detectedLatest commit: 42bf300 The changes in this PR will be included in the next version bump. This PR includes changesets to release 1 package
Not sure what this means? Click here to learn what changesets are. Click here if you're a maintainer who wants to add another changeset to this PR |
Rich-Harris
approved these changes
Jul 2, 2026
Merged
dummdidumm
pushed a commit
that referenced
this pull request
Jul 2, 2026
This PR was opened by the [Changesets release](https://github.com/changesets/action) GitHub action. When you're ready to do a release, you can merge this and the packages will be published to npm automatically. If you're not ready to do a release yet, that's fine, whenever you add more changesets to main, this PR will be updated. # Releases ## @sveltejs/kit@2.69.1 ### Patch Changes - fix: prevent prototype pollution when deleting file inputs ([#16218](#16218)) - fix: prevent unhandled promise rejection ([#16219](#16219)) Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
If a file input of a remote form is deleted, and the path to that file contains things like
__proto__you can do prototype pollution (you can e.g. delete methods from object prototypes).This fixes that by reusing the same mechanisms we already have in place elsewhere.
Big big big edge case + remote functions are experimental, hence no SEV.