NPM: React Router: RSCErrorHandler Missing Protocol Validation (XSS)

NPM: React Router: RSCErrorHandler Missing Protocol Validation XSS vulnerability discovered by ? in WordPress Npm react-router versions = 7.11.0, 7.18.0...

GHSA-H8FP-F39C-Q6MH React Router: RSCErrorHandler Missing Protocol Validation (XSS)

This is a follow up to https://github.com/remix-run/react-router/security/advisories/GHSA-8646-j5j9-6r62. React Router was alerted of a code path in the unstable RSC error handling path in which redirects from untrusted sources could still result in an XSS vector via attacker-supplied redirect...

@aaravpos/appointment-barber-booking (>=1.0.0, <=4.0.5), @aaravpos/appointment-booking-plugin (>=1.0.1, <=7.0.6) +264 more potentially affected by CVE-2026-53667 via react-router (>=7.11.0, <=7.17.0)

react-router NPM version =7.11.0, =1.0.0, =1.0.1, =0.0.9-alpha-20251217170854-13a5505369f22d85f29bcbbbe455c23672e2aca3, =1.3.7, =0.1.0, =0.1.0, =0.1.0, =0.1.0, =0.1.0, =3.2.0-ultramodern.0, =3.2.0-ultramodern.0, =3.2.0-ultramodern.0, =3.2.0-ultramodern.0, =3.2.0-ultramodern.127 and more Source...

@aaravpos/appointment-barber-booking (>=1.0.0, <=4.0.5), @aaravpos/appointment-booking-plugin (>=1.0.1, <=7.0.6) +264 more potentially affected by CVE-2026-53667 via react-router (>=7.11.0, <=7.17.0)

react-router NPM version =7.11.0, =1.0.0, =1.0.1, =0.0.9-alpha-20251217170854-13a5505369f22d85f29bcbbbe455c23672e2aca3, =1.3.7, =0.1.0, =0.1.0, =0.1.0, =0.1.0, =0.1.0, =3.2.0-ultramodern.0, =3.2.0-ultramodern.0, =3.2.0-ultramodern.0, =3.2.0-ultramodern.0, =3.2.0-ultramodern.127 and more Source...

React Router: RSCErrorHandler Missing Protocol Validation (XSS)

This is a follow up to https://github.com/remix-run/react-router/security/advisories/GHSA-8646-j5j9-6r62. React Router was alerted of a code path in the unstable RSC error handling path in which redirects from untrusted sources could still result in an XSS vector via attacker-supplied redirect...

0beny1s (1.1.6), 0desgin (0.0.1) +15106 more potentially affected by CVE-2026-53666 via react-router (>=6.4.0, <=7.17.0)

react-router NPM version =6.4.0, =7.17.0 is affected by a known vulnerability. The following packages have a transitive dependency on react-router and may be impacted: - 0beny1s 1.1.6 - 0desgin 0.0.1 - 0scarclassa 1.0.1 - 0scarclassb 1.0.1 - 0scarclassc 1.0.1 - 0scarclassd 1.0.1 - 0scarclasse 1.0...

0beny1s (1.1.6), 0desgin (0.0.1) +15106 more potentially affected by CVE-2026-53666 via react-router (>=6.4.0, <=7.17.0)

react-router NPM version =6.4.0, =7.17.0 is affected by a known vulnerability. The following packages have a transitive dependency on react-router and may be impacted: - 0beny1s 1.1.6 - 0desgin 0.0.1 - 0scarclassa 1.0.1 - 0scarclassb 1.0.1 - 0scarclassc 1.0.1 - 0scarclassd 1.0.1 - 0scarclasse 1.0...

GHSA-337J-9HXR-RHXG React Router: Arbitrary Constructor Injection via deserializeErrors() in React Router SSR Hydration

If application code allows attacker supplied input to overwrite certain aspects of errors caught by the SSR process, then it was possible for attacker to trigger unexpected constructor execution on the client which would trigger outbound network traffic. This is only possible with very specific a...

NPM: React Router: Arbitrary Constructor Injection via deserializeErrors() in React Router SSR Hydration

NPM: React Router: Arbitrary Constructor Injection via deserializeErrors in React Router SSR Hydration vulnerability discovered by ? in WordPress Npm react-router versions = 6.4.0, 7.18.0...

Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')

Overview Affected versions of this package are vulnerable to Use of Externally-Controlled Input to Select Classes or Code 'Unsafe Reflection' in the deserializeErrors function during SSR hydration. An attacker can cause unexpected constructor execution on the client, potentially resulting in...

React Router: Arbitrary Constructor Injection via deserializeErrors() in React Router SSR Hydration

If application code allows attacker supplied input to overwrite certain aspects of errors caught by the SSR process, then it was possible for attacker to trigger unexpected constructor execution on the client which would trigger outbound network traffic. This is only possible with very specific a...

find-my-way: DDoS with HTTP2

Impact Remotely triggerable DoS in find-my-way when it is used with Node's HTTP/2 server. The short version is that lookup passes req.method into find, and find indexes this.treesmethod. Since this.trees is a normal object, HTTP/2 method values like constructor, toString, or proto can resolve...

PT-2026-64215

Name of the Vulnerable Software and Affected Versions React Router versions 6.0.0 through 7.17.0 Description An open redirect issue exists where the use of backslashes in the component and the useNavigate function can lead to unexpected external navigations when attacker-supplied paths are...

PT-2026-64213

Name of the Vulnerable Software and Affected Versions React Router versions 7.11.0 through 7.17.0 Description The RSCErrorHandler lacks protocol validation, which allows redirects from untrusted sources. This can lead to a Cross-Site Scripting XSS vector—a technique where malicious scripts are...

Next.js: Cache confusion of response bodies for requests with bodies

Impact A server-side fetch with a request body may return a cached response body from a different request to the same URL but different body. Confidential data in the POST's response body would then leak to unauthorized requests. Though the request itself will not be deduped. This only applies to...

Next.js: Unbounded Server Action payload in Edge runtime

Impact Requests targeting Next.js applications using App Router with at least one Server Action can lead to excessive memory consumption if that Server Actions uses the Edge runtime Workarounds If you cannot upgrade, ensure your hosting provider limits the request's body size. 5 MiB should be...

GHSA-4C39-4CCG-62R3 Next.js: Unbounded Server Action payload in Edge runtime

Impact Requests targeting Next.js applications using App Router with at least one Server Action can lead to excessive memory consumption if that Server Actions uses the Edge runtime Workarounds If you cannot upgrade, ensure your hosting provider limits the request's body size. 5 MiB should be...

GHSA-955P-X3MX-JCVP Next.js: Unauthenticated disclosure of internal Server Function endpoints

Impact In Next.js applications using App Router, Server Actions use server or use cache endpoints can be disclosed bypassing any authentication on the pages where these endpoints are usually used. Server Action IDs can be disclosed to unauthenticated users via publicly served client artifacts for...

Next.js: Unauthenticated disclosure of internal Server Function endpoints

Impact In Next.js applications using App Router, Server Actions use server or use cache endpoints can be disclosed bypassing any authentication on the pages where these endpoints are usually used. Server Action IDs can be disclosed to unauthenticated users via publicly served client artifacts for...

GHSA-6GPP-XCG3-4W24 Next.js: Middleware / Proxy bypass in App Router applications using Turbopack and single locale

Impact Crafted requests targeting Next.js applications using App Router built with Turbopack and a single entry in config.i18n.locales can bypass middleware/proxy based authentication. Workarounds If you cannot upgrade immediately, enforce authorization in the page's server-side data path instead...