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Overview

next is a react framework.

Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling through the Server Actions process. An attacker can cause the server to hang by constructing requests that leave Server-Actions requests pending until the hosting provider terminates the function execution.

Note:

This is only exploitable if there are no protections against long-running Server Action invocations.

Remediation

Upgrade next to version 13.5.8, 14.2.21, 15.1.2 or higher.

References

• GitHub Commit
• GitHub Commit

Overview

next is a react framework.

Affected versions of this package are vulnerable to Race Condition in the Pages Router. An attacker can cause the server to serve incorrect pageProps data instead of the expected HTML content by exploiting a race condition between two requests, one containing the ?__nextDataRequest=1 query parameter and another with the x-now-route-matches header.

Notes:

1. This is only exploitable if the CDN provider caches a 200 OK response even in the absence of explicit cache-control headers, enabling a poisoned response to persist and be served to subsequent users;

2. No backend access or privileged escalation is possible through this vulnerability;

3. Applications hosted on Vercel's platform are not affected by this issue, as the platform does not cache responses based solely on 200 OK status without explicit cache-control headers.

4. This is a bypass of the fix for CVE-2024-46982

Workaround

This can be mitigated by stripping the x-now-route-matches header from all incoming requests at your CDN and setting cache-control: no-store for all responses under risk.

Remediation

Upgrade next to version 14.2.24, 15.1.6 or higher.

References

• GitHub Commit
• Vercel Advisory

Overview

next is a react framework.

Affected versions of this package are vulnerable to Use of Cache Containing Sensitive Information in the image optimization process, when responses from API routes vary based on request headers such as Cookie or Authorization. An attacker can gain unauthorized access to sensitive image data by exploiting cache key confusion, causing responses intended for authenticated users to be served to unauthorized users.

Note: Exploitation requires a prior authorized request to populate the cache.

Remediation

Upgrade next to version 14.2.31, 15.4.2-canary.19, 15.4.5 or higher.

References

• GitHub Commit
• GitHub Commit
• GitHub Commit
• GitHub PR
• Vercel Security Advisory

Overview

next is a react framework.

Affected versions of this package are vulnerable to Resource Exhaustion via the cache-control header. An attacker can cause a denial of service to all users requesting the same URL via a CDN by caching empty prefetch responses.

Remediation

Upgrade next to version 13.4.20-canary.13 or higher.

References

• GitHub Commit
• GitHub Diff
• GitHub Issue
• GitHub PR

Overview

postcss is a PostCSS is a tool for transforming styles with JS plugins.

Affected versions of this package are vulnerable to Improper Input Validation when parsing external Cascading Style Sheets (CSS) with linters using PostCSS. An attacker can cause discrepancies by injecting malicious CSS rules, such as @font-face{ font:(\r/*);}. This vulnerability is because of an insecure regular expression usage in the RE_BAD_BRACKET variable.

Remediation

Upgrade postcss to version 8.4.31 or higher.

References

• GitHub Commit
• GitHub PR
• GitHub Release
• Vulnerable Code