CVE-2026-126187

Description

React is a JavaScript library for building user interfaces. From 19.0.0 until 19.0.9, 19.1.10, 19.2.9, and 19.3.1, the react-server-dom-webpack, react-server-dom-parcel, and react-server-dom-turbopack packages are vulnerable to unauthenticated remote code execution through crafted payloads targeting frameworks that support React Server Components. The vulnerability only affects extremely rare cases where responses transport multiple typed arrays and an attacker-controlled value. Applications whose React code does not use a server are not affected. Applications that do not use a framework, bundler, or bundler plugin that supports React Server Components are not affected. This issue is fixed in versions 19.0.9, 19.1.10, 19.2.9, and 19.3.1.

References

https://github.com/react/react/security/advisories/GHSA-xqc2-xf4c-x3h3

https://github.com/react/react/releases/tag/v19.3.1

https://github.com/react/react/releases/tag/v19.2.9

https://github.com/react/react/releases/tag/v19.1.10

https://github.com/react/react/releases/tag/v19.0.9

https://github.com/react/react/pull/37846

https://github.com/react/react/pull/37845

https://github.com/react/react/pull/37844

https://github.com/react/react/pull/37843

https://github.com/react/react/pull/37842

https://github.com/react/react/commit/61aa00df822d0eb76d0362eb8b6fdd3527693efe

https://github.com/react/react/commit/611d9217df39cf7b8ac91b2e41fd00555923e904

https://github.com/react/react/commit/3d06b4005ac0cf9dec37267f26174adfe6d83611

https://github.com/react/react/commit/249ac87b0dadea4ba024d1393e5cb60cf1186080

https://github.com/react/react/commit/0c9913ae87283f96e868a8f1c20a3389827632d0

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-123052

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3

CVSS v4