CVE-2026-42342

A flaw was found in React Router and @remix-run/server-runtime. A remote attacker can exploit this vulnerability by sending certain crafted requests to the manifest endpoint. This can lead to unbounded path expansion, consuming disproportionate server resources. The primary consequence is a denia...

@remix-run/architect (>=2.17.3, <=2.17.4), @remix-run/cloudflare (>=2.17.3, <=2.17.4) +10 more potentially affected by CVE-2026-53663 via @remix-run/server-runtime (>=2.17.3, <=2.17.4)

@remix-run/server-runtime NPM version =2.17.3, =2.17.3, =2.17.3, =2.17.3, =2.17.3, =2.17.3, =2.17.3, =2.17.3, =2.17.3, =2.17.3, =2.17.3, =2.17.3, =0.11.30, =0.12.30 Source cves: CVE-2026-53663 Source advisory: MEND:CVE-2026-53663...

@remix-run/architect (>=2.17.3, <=2.17.4), @remix-run/cloudflare (>=2.17.3, <=2.17.4) +10 more potentially affected by CVE-2026-53663 via @remix-run/server-runtime (>=2.17.3, <=2.17.4)

@remix-run/server-runtime NPM version =2.17.3, =2.17.3, =2.17.3, =2.17.3, =2.17.3, =2.17.3, =2.17.3, =2.17.3, =2.17.3, =2.17.3, =2.17.3, =2.17.3, =0.11.30, =0.12.30 Source cves: CVE-2026-53663 Source advisory: OSV:GHSA-84G9-W2XQ-VCV6...

@remix-run/architect (>=2.17.3, <=2.17.4), @remix-run/cloudflare (>=2.17.3, <=2.17.4) +10 more potentially affected by CVE-2026-53663 via @remix-run/server-runtime (>=2.17.3, <=2.17.4)

@remix-run/server-runtime NPM version =2.17.3, =2.17.3, =2.17.3, =2.17.3, =2.17.3, =2.17.3, =2.17.3, =2.17.3, =2.17.3, =2.17.3, =2.17.3, =2.17.3, =0.11.30, =0.12.30 Source cves: CVE-2026-53663 Source advisory: SNYK:JS-REMIXRUNSERVERRUNTIME-17342509...

@remix-run/architect (>=2.17.3, <=2.17.4), @remix-run/cloudflare (>=2.17.3, <=2.17.4) +10 more potentially affected by CVE-2026-53663 via @remix-run/server-runtime (>=2.17.3, <=2.17.4)

@remix-run/server-runtime NPM version =2.17.3, =2.17.3, =2.17.3, =2.17.3, =2.17.3, =2.17.3, =2.17.3, =2.17.3, =2.17.3, =2.17.3, =2.17.3, =2.17.3, =0.11.30, =0.12.30 Source cves: CVE-2026-53663 Source advisory: GHSA-84G9-W2XQ-VCV6...

Cross-site Request Forgery (CSRF)

Overview @remix-run/server-runtime is a Server runtime for Remix Affected versions of this package are vulnerable to Cross-site Request Forgery CSRF due to insufficient CSRF checks for PUT, PATCH, and DELETE document requests. An attacker can cause unauthorized state changes by tricking a user in...

CVE-2026-44483

RVF formerly Remix Validated Form provides easy form validation and state management for React. From 6.0.0 to before 6.0.4 and 7.0.2, setPath in @rvf/set-get used by @rvf/core to flatten incoming form data into a nested object does not block the keys proto, constructor, or prototype when walking ...

React Router vulnerable to Denial of Service via reflected user input in single-fetch

A DoS vulnerability exists in the React Router v7 Framework Mode, as well as Remix v2.9.0+ with Single Fetch enabled. In some scenarios the underlying serialization algorithm can become a bottleneck when encoding specific types of data into server responses. Please upgrade to React Router v7.14.0...

GHSA-RXV8-25V2-QMQ8 React Router vulnerable to Denial of Service via reflected user input in single-fetch

A DoS vulnerability exists in the React Router v7 Framework Mode, as well as Remix v2.9.0+ with Single Fetch enabled. In some scenarios the underlying serialization algorithm can become a bottleneck when encoding specific types of data into server responses. Please upgrade to React Router v7.14.0...

SUSE CVE-2026-42342

React Router is a router for React. In versions 7.0.0 through 7.14.x of react-router and versions 2.10.0 through 2.17.4 of @remix-run/server-runtime, certain crafted requests can consume disproportionate server resources via unbounded path expansion in the manifest endpoint, resulting in response...

GHSA-8X6R-G9MW-2R78 React Router vulnerable to DoS via unbounded path expansion in __manifest endpoint

There exists a potential DOS attack vector in React Router Framework Mode applications as well as Remix v2.10.0 - 2.17.4. Certain requests can be crafted to consume disproportionate resources on the server, resulting in response time degredation and/or service unavailability for end users. !NOTE...

EUVD-2026-34000

React Router vulnerable to DoS via unbounded path expansion in manifest endpoint...

React Router vulnerable to DoS via unbounded path expansion in __manifest endpoint

There exists a potential DOS attack vector in React Router Framework Mode applications as well as Remix v2.10.0 - 2.17.4. Certain requests can be crafted to consume disproportionate resources on the server, resulting in response time degredation and/or service unavailability for end users. !NOTE...

@buttery/tokens (>=0.1.2, <=0.1.10), @common-stack/frontend-stack-react (>=6.0.6-alpha.23, <=10.0.1-alpha.0) +25 more potentially affected by CVE-2026-42342 via @remix-run/server-runtime (>=2.10.0, <=2.17.4)

@remix-run/server-runtime NPM version =2.10.0, =0.1.2, =6.0.6-alpha.23, =6.0.6-alpha.28, =0.1.0, =5.6.0, =5.13.0, =5.6.0, =5.6.0, =0.1.36, =2.10.0, =2.10.0, =2.10.0, =2.10.0, =2.10.0, =2.10.0, =2.17.4 and more Source cves: CVE-2026-42342 Source advisory: GHSA-8X6R-G9MW-2R78...

@1023-ventures/merope2 (>=0.2.1, <=0.2.9), @1023-ventures/vega-core (>=0.5.0, <=0.6.2) +1351 more potentially affected by CVE-2026-40181 via @remix-run/router (>=1.3.0, <=1.23.2)

@remix-run/router NPM version =1.3.0, =0.2.1, =0.5.0, =0.0.1, =0.0.1, =3.0.0, =0.0.0-beta-20260120211922, =1.0.0, =1.0.0, =1.0.0, =2.7.0, =0.0.1, =0.1.0, =0.0.0, =2.13.1, =2.13.94 and more Source cves: CVE-2026-40181 Source advisory: GHSA-2J2X-HQR9-3H42...

@1023-ventures/merope2 (>=0.2.1, <=0.2.9), @1023-ventures/vega-core (>=0.5.0, <=0.6.2) +1351 more potentially affected by CVE-2026-40181 via @remix-run/router (>=1.3.0, <=1.23.2)

@remix-run/router NPM version =1.3.0, =0.2.1, =0.5.0, =0.0.1, =0.0.1, =3.0.0, =0.0.0-beta-20260120211922, =1.0.0, =1.0.0, =1.0.0, =2.7.0, =0.0.1, =0.1.0, =0.0.0, =2.13.1, =2.13.94 and more Source cves: CVE-2026-40181 Source advisory: OSV:GHSA-2J2X-HQR9-3H42...

PT-2026-46089

There exists a potential DOS attack vector in React Router Framework Mode applications as well as Remix v2.10.0 - 2.17.4. Certain requests can be crafted to consume disproportionate resources on the server, resulting in response time degredation and/or service unavailability for end users. !NOTE...

Allocation of Resources Without Limits or Throttling

Overview @remix-run/server-runtime is a Server runtime for Remix Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling through the manifest endpoint. An attacker can exhaust server resources and cause service disruption by sending specially craft...

CVE-2026-42342

React Router is a router for React. In versions 7.0.0 through 7.14.x of react-router and versions 2.10.0 through 2.17.4 of @remix-run/server-runtime, certain crafted requests can consume disproportionate server resources via unbounded path expansion in the manifest endpoint, resulting in response...

CVE-2026-42342

CVE-2026-42342 affects React Router and Remix Server Runtime: versions 7.0.0–7.14.x of react-router and 2.10.0–2.17.4 of @remix-run/server-runtime are vulnerable to DoS via unbounded path expansion on the __manifest endpoint, causing high resource usage and potential unavailability for Framework ...