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npm / react-is

react-is

What changed in react-is 19, from its official release notes, upgrade guides and advisories. Also covers @types/react-is, react-server-dom-webpack, react-test-renderer. Sources checked 2026-10-19.

9 security1 performance1 behavior and defaults3 fixes and other

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@unstale/cli 0.2.0 on npm

react-is 1914 changes

Security 9

  • Facebook React has a Denial of Service Vulnerability in React Server Components

    19.0.6, 19.1.7, 19.2.6security advisory

  • React Server Components have a Denial of Service Vulnerability

    19.0.5, 19.1.6, 19.2.5security advisory

  • React Server Components have multiple Denial of Service Vulnerabilities

    19.0.4, 19.1.5, 19.2.4security advisory

  • Denial of Service Vulnerability in React Server Components

    19.0.3, 19.1.4, 19.2.3security advisory

  • Denial of Service Vulnerability in React Server Components

    19.0.2, 19.1.3, 19.2.2security advisory

  • Source Code Exposure Vulnerability in React Server Components

    19.0.2, 19.1.3, 19.2.2security advisory

  • React Server Components are Vulnerable to RCE

    19.0.1, 19.1.2, 19.2.1security advisory

  • Adds DoS mitigations to Server Actions and hardens Server Components.

    19.0.4, 19.1.5release notesrelease notes

  • Hardened Server Components.

    19.0.4release notes

Performance 1

  • Type hardening and performance improvements were made to React Server Components.

    19.2.6release notes

Behavior and default changes 1

Fixes and other changes 3