next 14.3.0-canary.78

Direct Vulnerabilities

Known vulnerabilities in the next package. This does not include vulnerabilities belonging to this package’s dependencies.

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Vulnerability	Vulnerable Version
H Allocation of Resources Without Limits or Throttling next is a react framework. Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling via the `createMap`, `createSet`, and `extractIterator` functions in `packages/react-server/src/ReactFlightReplyServer.js`. An attacker can crash the server by supplying a model that contains cyclic reference and is consumed more than once during React Server Components decoding. The repeated consumption triggers an exception during reply processing, breaking rendering for requests that handle attacker-controlled Flight payloads. How to fix Allocation of Resources Without Limits or Throttling? Upgrade `next` to version 15.5.15, 16.2.3 or higher.	>=13.0.0 <15.5.15>=15.6.0-canary.0 <16.2.3
H Allocation of Resources Without Limits or Throttling next is a react framework. Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling in the decoding reply functions of React Flight protocol. An attacker can cause server crashes, out-of-memory exceptions, or excessive CPU usage by sending specially crafted HTTP requests to Server Function endpoints. Notes: This issue is a result of an incomplete fix for CVE-2025-55184 If your app’s React code does not use a server, your app is not affected by these vulnerabilities. If your app does not use a framework, bundler, or bundler plugin that supports React Server Components, your app is not affected by these vulnerabilities. How to fix Allocation of Resources Without Limits or Throttling? Upgrade `next` to version 15.0.8, 15.1.12, 15.2.9, 15.3.9, 15.4.11, 15.5.10, 15.6.0-canary.61, 16.0.11, 16.1.5, 16.2.0-canary.9 or higher.	>=13.0.0 <15.0.8>=15.1.0 <15.1.12>=15.2.0-canary.0 <15.2.9>=15.3.0-canary.0 <15.3.9>=15.4.0-canary.0 <15.4.11>=15.5.0 <15.5.10>=15.6.0-canary.0 <15.6.0-canary.61>=16.0.0-canary.0 <16.0.11>=16.1.0-canary.0 <16.1.5>=16.2.0-canary.0 <16.2.0-canary.9
M HTTP Request Smuggling next is a react framework. Affected versions of this package are vulnerable to HTTP Request Smuggling during the rewrite of the proxy traffic to an external backend. An attacker can access unintended backend routes by sending crafted `DELETE` or `OPTIONS` requests with `Transfer-Encoding: chunked` headers. This is only exploitable if the application is not hosted on providers that handle rewrites at the CDN level. How to fix HTTP Request Smuggling? Upgrade `next` to version 15.5.13, 16.1.7, 16.2.0-canary.102 or higher.	>=9.5.0 <15.5.13>=16.0.0-beta.0 <16.1.7>=16.2.0-canary.0 <16.2.0-canary.102
M Allocation of Resources Without Limits or Throttling next is a react framework. Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling due to the lack of an upper bound on the disk cache used by the image optimization. An attacker can exhaust disk storage by generating a large number of unique image optimization variants, leading to service disruption. How to fix Allocation of Resources Without Limits or Throttling? Upgrade `next` to version 16.1.7, 16.2.0-canary.54 or higher.	>=10.0.0 <16.1.7>=16.2.0-canary.0 <16.2.0-canary.54
H Allocation of Resources Without Limits or Throttling next is a react framework. Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling via the `fetchExternalImage()` function, which is used for image optimization and loads external images into memory without a maximum size limit. An attacker can exhaust system memory and disrupt service availability by requesting optimization of very large images from external domains. Note: This is only exploitable if `remotePatterns` is configured to allow image optimization from external domains and the attacker can serve or control a large image on an allowed domain. How to fix Allocation of Resources Without Limits or Throttling? Upgrade `next` to version 15.5.10, 16.1.1-canary.15, 16.1.5 or higher.	>=10.0.0 <15.5.10>=16.0.0-beta.0 <16.1.1-canary.15>=16.1.1 <16.1.5
C Arbitrary Code Injection next is a react framework. Affected versions of this package are vulnerable to Arbitrary Code Injection via unsafe deserialization of RSC payloads from HTTP requests to Server Function endpoints. An unauthenticated attacker can execute arbitrary code on the server by sending malicious HTTP requests. Note: Serverless applications and applications that do not use a framework, bundler, or bundler plugin that supports React Server Components are not affected by this vulnerability. Next.js 13.x, Next.js 14.x stable, Pages Router applications, and the Edge Runtime are not affected. This vulnerability originates in the upstream React implementation. This advisory tracks the downstream impact on Next.js applications using the App Router. CVE-2025-66478 was originally announced for this vulnerability and later rejected as a duplicate of CVE-2025-55182. How to fix Arbitrary Code Injection? Upgrade `next` to version 15.0.5, 15.1.9, 15.2.6, 15.3.6, 15.4.8, 15.5.7, 16.0.7 or higher.	>=14.3.0-canary.77 <15.0.5>=15.1.0 <15.1.9>=15.2.0-canary.0 <15.2.6>=15.3.0-canary.0 <15.3.6>=15.4.0-canary.0 <15.4.8>=15.5.0 <15.5.7>=16.0.0-beta.0 <16.0.7

Vulnerability

Vulnerable Version

Allocation of Resources Without Limits or Throttling

next is a react framework.

Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling via the createMap, createSet, and extractIterator functions in packages/react-server/src/ReactFlightReplyServer.js. An attacker can crash the server by supplying a model that contains cyclic reference and is consumed more than once during React Server Components decoding. The repeated consumption triggers an exception during reply processing, breaking rendering for requests that handle attacker-controlled Flight payloads.

How to fix Allocation of Resources Without Limits or Throttling?

Upgrade next to version 15.5.15, 16.2.3 or higher.

>=13.0.0 <15.5.15>=15.6.0-canary.0 <16.2.3

Allocation of Resources Without Limits or Throttling

next is a react framework.

Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling in the decoding reply functions of React Flight protocol. An attacker can cause server crashes, out-of-memory exceptions, or excessive CPU usage by sending specially crafted HTTP requests to Server Function endpoints.

Notes:

This issue is a result of an incomplete fix for CVE-2025-55184
If your app’s React code does not use a server, your app is not affected by these vulnerabilities.
If your app does not use a framework, bundler, or bundler plugin that supports React Server Components, your app is not affected by these vulnerabilities.

How to fix Allocation of Resources Without Limits or Throttling?

Upgrade next to version 15.0.8, 15.1.12, 15.2.9, 15.3.9, 15.4.11, 15.5.10, 15.6.0-canary.61, 16.0.11, 16.1.5, 16.2.0-canary.9 or higher.

>=13.0.0 <15.0.8>=15.1.0 <15.1.12>=15.2.0-canary.0 <15.2.9>=15.3.0-canary.0 <15.3.9>=15.4.0-canary.0 <15.4.11>=15.5.0 <15.5.10>=15.6.0-canary.0 <15.6.0-canary.61>=16.0.0-canary.0 <16.0.11>=16.1.0-canary.0 <16.1.5>=16.2.0-canary.0 <16.2.0-canary.9

HTTP Request Smuggling

next is a react framework.

Affected versions of this package are vulnerable to HTTP Request Smuggling during the rewrite of the proxy traffic to an external backend. An attacker can access unintended backend routes by sending crafted DELETE or OPTIONS requests with Transfer-Encoding: chunked headers. This is only exploitable if the application is not hosted on providers that handle rewrites at the CDN level.

How to fix HTTP Request Smuggling?

Upgrade next to version 15.5.13, 16.1.7, 16.2.0-canary.102 or higher.

>=9.5.0 <15.5.13>=16.0.0-beta.0 <16.1.7>=16.2.0-canary.0 <16.2.0-canary.102

Allocation of Resources Without Limits or Throttling

next is a react framework.

Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling due to the lack of an upper bound on the disk cache used by the image optimization. An attacker can exhaust disk storage by generating a large number of unique image optimization variants, leading to service disruption.

How to fix Allocation of Resources Without Limits or Throttling?

Upgrade next to version 16.1.7, 16.2.0-canary.54 or higher.

>=10.0.0 <16.1.7>=16.2.0-canary.0 <16.2.0-canary.54

Allocation of Resources Without Limits or Throttling

next is a react framework.

Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling via the fetchExternalImage() function, which is used for image optimization and loads external images into memory without a maximum size limit. An attacker can exhaust system memory and disrupt service availability by requesting optimization of very large images from external domains.

Note:

This is only exploitable if remotePatterns is configured to allow image optimization from external domains and the attacker can serve or control a large image on an allowed domain.

How to fix Allocation of Resources Without Limits or Throttling?

Upgrade next to version 15.5.10, 16.1.1-canary.15, 16.1.5 or higher.

>=10.0.0 <15.5.10>=16.0.0-beta.0 <16.1.1-canary.15>=16.1.1 <16.1.5

Arbitrary Code Injection

next is a react framework.

Affected versions of this package are vulnerable to Arbitrary Code Injection via unsafe deserialization of RSC payloads from HTTP requests to Server Function endpoints. An unauthenticated attacker can execute arbitrary code on the server by sending malicious HTTP requests.

Note:

Serverless applications and applications that do not use a framework, bundler, or bundler plugin that supports React Server Components are not affected by this vulnerability.

Next.js 13.x, Next.js 14.x stable, Pages Router applications, and the Edge Runtime are not affected.

This vulnerability originates in the upstream React implementation. This advisory tracks the downstream impact on Next.js applications using the App Router.

CVE-2025-66478 was originally announced for this vulnerability and later rejected as a duplicate of CVE-2025-55182.

How to fix Arbitrary Code Injection?

Upgrade next to version 15.0.5, 15.1.9, 15.2.6, 15.3.6, 15.4.8, 15.5.7, 16.0.7 or higher.

>=14.3.0-canary.77 <15.0.5>=15.1.0 <15.1.9>=15.2.0-canary.0 <15.2.6>=15.3.0-canary.0 <15.3.6>=15.4.0-canary.0 <15.4.8>=15.5.0 <15.5.7>=16.0.0-beta.0 <16.0.7

next@14.3.0-canary.78

The React Framework

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Direct Vulnerabilities

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