CVE-2026-53666 React Router: Arbitrary Constructor Injection via deserializeErrors() in React Router SSR Hydration

React Router is a router for React. In versions 6.4.0 through 7.17.0, if application code was written in a way that allows attacker-supplied input to overwrite certain aspects of errors caught by the SSR process, then it was possible for an attacker to trigger unexpected constructor execution on...

CVE-2026-59728

CVE-2026-59728 (astrojs/rss) affects Astro versions 1.0.0–4.0.18 where source.title and enclosure.type are interpolated into XML without escaping in packages/astro-rss/src/index.ts, then parsed by fast-xml-parser. This allows an attacker-controlled value to inject arbitrary XML into the generated...

EUVD-2026-49584

Astro is a web framework for content-driven websites. In versions 1.0.0 through 4.0.18, the source.title and enclosure.type item fields in packages/astro-rss/src/index.ts are interpolated directly into XML template strings without XML-character escaping before being parsed by fast-xml-parser. Bot...

@amazeelabs/bridge-waku (>=1.1.0, <=2.0.1), @amazeelabs/executors (>=3.0.0, <=3.1.14) +52 more potentially affected by CVE-2026-44907 via react-server-dom-webpack (>=19.0.0, <=19.0.1)

react-server-dom-webpack NPM version =19.0.0, =1.1.0, =3.0.0, =1.1.0, =1.1.0, =1.0.0-canary.12245, =0.9.1-next.19, =1.0.0-canary.12245, =0.9.1-next.19, =1.0.0-canary.12245, =1.0.0-canary.12245, =1.0.0-canary.12245, =0.9.1-next.19, =1.0.0-canary.12245, =1.0.0-canary.12245, =0.0.4, =2.0.3-next.0 an...

@amazeelabs/bridge-waku (>=1.1.0, <=2.0.1), @amazeelabs/executors (>=3.0.0, <=3.1.14) +52 more potentially affected by CVE-2026-44907 via react-server-dom-webpack (>=19.0.0, <=19.0.1)

react-server-dom-webpack NPM version =19.0.0, =1.1.0, =3.0.0, =1.1.0, =1.1.0, =1.0.0-canary.12245, =0.9.1-next.19, =1.0.0-canary.12245, =0.9.1-next.19, =1.0.0-canary.12245, =1.0.0-canary.12245, =1.0.0-canary.12245, =0.9.1-next.19, =1.0.0-canary.12245, =1.0.0-canary.12245, =0.0.4, =2.0.3-next.0 an...

Security Bulletin: Multiple vulnerabilities found in IBM ApplinX.

Summary IBM ApplinX has been updated in order to address multiple vulnerabilities CVE-2026-50170, CVE-2026-50171, CVE-2026-54266, CVE-2026-54268, CVE-2026-53404, CVE-2026-55956, CVE-2026-53434, CVE-2026-55276, CVE-2018-1000665, CVE-2026-50557, CVE-2026-54265, CVE-2026-52725, CVE-2026,...

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...

PT-2026-64212

Name of the Vulnerable Software and Affected Versions React Router versions 6.4.0 through 7.17.0 Description In Framework Mode and Data Mode applications performing manual SSR Server-Side Rendering, a flaw exists where attacker-supplied input can overwrite specific aspects of errors caught during...

hono/jsx does not isolate context per request, leading to cross-request data disclosure

Summary hono/jsx did not isolate context values per request during server-side rendering. While an async component was suspended on await, its provided context value stayed observable to other requests rendering concurrently, so useContext could return a value from a different in-flight request...

EUVD-2026-42326

hono/jsx does not isolate context per request, leading to cross-request data disclosure...

GHSA-HVRM-45R6-MJFJ hono/jsx does not isolate context per request, leading to cross-request data disclosure

Summary hono/jsx did not isolate context values per request during server-side rendering. While an async component was suspended on await, its provided context value stayed observable to other requests rendering concurrently, so useContext could return a value from a different in-flight request...

GHSA-W62V-XXXG-MG59 Hono: Server-Side XSS via JSX Escaping Bypass in cx() Utility

Summary cx in hono/css composes class names from plain strings but marks the result as already-escaped without HTML-escaping the input. When the result is used as a JSX class attribute during server-side rendering, the value is written into the attribute unescaped, so untrusted input can break ou...

Hono: Server-Side XSS via JSX Escaping Bypass in cx() Utility

Summary cx in hono/css composes class names from plain strings but marks the result as already-escaped without HTML-escaping the input. When the result is used as a JSX class attribute during server-side rendering, the value is written into the attribute unescaped, so untrusted input can break ou...

EUVD-2026-42327

Hono: Server-Side XSS via JSX Escaping Bypass in cx Utility...

Cross-site Scripting (XSS)

Overview astro is an Astro is a modern site builder with web best practices, performance, and DX front-of-mind. Affected versions of this package are vulnerable to Cross-site Scripting XSS via the renderHTMLElement function. An attacker can inject arbitrary event-handler attributes or sibling...

GHSA-F48W-9M4C-M7F5 Astro: XSS via unescaped spread attribute names in renderHTMLElement (incomplete fix for CVE-2026-54298)

Summary The fix for CVE-2026-54298 GHSA-jrpj-wcv7-9fh9 added an INVALIDATTRNAMECHAR guard to addAttribute so that spread-prop attribute names containing "' /= or whitespace are dropped. A second attribute-rendering path, renderHTMLElement in packages/astro/src/runtime/server/render/dom.ts, has it...

Improper Encoding or Escaping of Output

Overview astro is an Astro is a modern site builder with web best practices, performance, and DX front-of-mind. Affected versions of this package are vulnerable to Improper Encoding or Escaping of Output via the transition:persist, transition:scope, or transition:persist-props directives when...

PT-2026-61809

Name of the Vulnerable Software and Affected Versions Astro versions prior to 7.0.6 Description A cross-site scripting XSS issue exists when the software is used with an SSR runtime that exposes a global HTMLElement such as Deno, Bun with a DOM shim, or jsdom/happy-dom in Node and a class extendi...