This upgrade is completely backwards compatible and recommended for all users on versions below 9.5.4. For future security related communications of our OSS projects, please join this mailing list.
A security team from one of our partners noticed an issue in Next.js that allowed for open redirects to occur.
Specially encoded paths could be used with the trailing slash redirect to allow an open redirect to occur to an external site.
In general, this redirect does not directly harm users although can allow for phishing attacks by redirecting to an attackers domain from a trusted domain.
We recommend upgrading to the latest version of Next.js to improve the overall security of your application.
How to Upgrade
We have released patch versions for both the stable and canary channels of Next.js.
To upgrade run npm install next@latest --save
Impact
Affected: Users of Next.js between 9.5.0 and 9.5.3
Not affected: Deployments on Vercel (https://vercel.com) are not affected
Not affected: Deployments using next export
We recommend everyone to upgrade regardless of whether you can reproduce the issue or not.
How to Assess Impact
If you think users could have been affected, you can filter logs of affected sites by %2F with a 308 response.
What is Being Done
As Next.js has grown in popularity, it has received the attention of security teams and auditors. We are thankful to those that reached out for their investigation and discovery of the original bug and subsequent responsible disclosure.
We've landed a patch that ensures encoding is handled properly for these types of redirects so the open redirect can no longer occur.
Regression tests for this attack were added to the security integration test suite.
We have notified known Next.js users in advance of this publication.
A public CVE was released.
If you want to stay on top of our security related news impacting Next.js or other Vercel projects, please join this mailing list.
We encourage responsible disclosure of future issues. Please email us at security@vercel.com. We are actively monitoring this mailbox.
Core Changes
Make the image post-processor ignore SVG images: #16732
Only update lookups for dev overlay if mounted: #16776
Ensure interpolating dynamic href values works correctly: #16774
Add automatic reloading when editing GS(S)P methods: #16744
Update to show build indicator while re-fetching GS(S)P data in dev: #16789
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Bumps next from 9.5.2 to 9.5.4.
Release notes
Sourced from next's releases.
... (truncated)
Commits
6588108v9.5.47108567v9.5.4-canary.255d79a8cUpdate workflow step to restore cache (#17656)4c38e3efix typo (#17653)241f38ev9.5.4-canary.247dec911change anonymous functions to named in docs examples (#17510)1659e4dUpdate migrating from Gatsby docs. (#17636)06a8b1aAdd docs on how to migrate from Gatsby. (#17491)04234ccUpdate to use hasNextSupport for custom-routes in next export check (#17630)742f5d9test(create-next-app): increase coverage (#17507)Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting
@dependabot rebase.Dependabot commands and options
You can trigger Dependabot actions by commenting on this PR: - `@dependabot rebase` will rebase this PR - `@dependabot recreate` will recreate this PR, overwriting any edits that have been made to it - `@dependabot merge` will merge this PR after your CI passes on it - `@dependabot squash and merge` will squash and merge this PR after your CI passes on it - `@dependabot cancel merge` will cancel a previously requested merge and block automerging - `@dependabot reopen` will reopen this PR if it is closed - `@dependabot close` will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually - `@dependabot ignore this major version` will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself) - `@dependabot ignore this minor version` will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself) - `@dependabot ignore this dependency` will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself) - `@dependabot use these labels` will set the current labels as the default for future PRs for this repo and language - `@dependabot use these reviewers` will set the current reviewers as the default for future PRs for this repo and language - `@dependabot use these assignees` will set the current assignees as the default for future PRs for this repo and language - `@dependabot use this milestone` will set the current milestone as the default for future PRs for this repo and language You can disable automated security fix PRs for this repo from the [Security Alerts page](https://github.com/feednext/feednext/network/alerts).