GHSA-xqc2-xf4c-x3h3

Source

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

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/11/GHSA-xqc2-xf4c-x3h3/GHSA-xqc2-xf4c-x3h3.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-xqc2-xf4c-x3h3

Aliases

CVE-2026-126187

Published

2026-11-10T22:44:12Z

Modified

2026-11-10T23:00:03Z

Severity

9.5 (Critical) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:N CVSS Calculator

Summary

React: Unauthenticated Remote Code Execution in React Server Components

Details

Impact

Crafted payloads targeting frameworks supporting React Server Components can lead to remote code execution. This only affects extremely rare cases where responses transport multiple typed arrays and an attacker-controlled value.

Updating immediately is recommended.

The vulnerability exists in versions 19.0.0 through 19.0.8, 19.1.0 through 19.1.9, 19.2.0 through 19.2.8 and 19.3.0 of:

react-server-dom-webpack
react-server-dom-parcel
react-server-dom-turbopack

Patches

Fixes were back ported to versions 19.0.09, 19.1.10, 19.2.9, and 19.3.1.

If applications are using any of the above packages please upgrade to any of the fixed versions immediately.

If an app’s React code does not use a server, the app is not affected by this vulnerability. If an app does not use a framework, bundler, or bundler plugin that supports React Server Components, the app is not affected by this vulnerability.

Database specific

{
    "cwe_ids": [
        "CWE-502"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-11-10T22:44:12Z",
    "nvd_published_at": null,
    "severity": "CRITICAL"
}

References

Affected packages

npm

react-server-dom-parcel

Package

Name: react-server-dom-parcel; View open source insights on deps.dev
Purl: pkg:npm/react-server-dom-parcel

Affected ranges

Type: SEMVER
Events: Introduced

19.0.0

Fixed

19.0.9

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/11/GHSA-xqc2-xf4c-x3h3/GHSA-xqc2-xf4c-x3h3.json"

react-server-dom-parcel

Package

Name: react-server-dom-parcel; View open source insights on deps.dev
Purl: pkg:npm/react-server-dom-parcel

Affected ranges

Type: SEMVER
Events: Introduced

19.1.0

Fixed

19.1.10

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/11/GHSA-xqc2-xf4c-x3h3/GHSA-xqc2-xf4c-x3h3.json"

react-server-dom-parcel

Package

Name: react-server-dom-parcel; View open source insights on deps.dev
Purl: pkg:npm/react-server-dom-parcel

Affected ranges

Type: SEMVER
Events: Introduced

19.2.0

Fixed

19.2.9

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/11/GHSA-xqc2-xf4c-x3h3/GHSA-xqc2-xf4c-x3h3.json"

react-server-dom-parcel

Package

Name: react-server-dom-parcel; View open source insights on deps.dev
Purl: pkg:npm/react-server-dom-parcel

Affected ranges

Type: SEMVER
Events: Introduced

19.3.0

Fixed

19.3.1

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/11/GHSA-xqc2-xf4c-x3h3/GHSA-xqc2-xf4c-x3h3.json"

react-server-dom-turbopack

Package

Name: react-server-dom-turbopack; View open source insights on deps.dev
Purl: pkg:npm/react-server-dom-turbopack

Affected ranges

Type: SEMVER
Events: Introduced

19.0.0

Fixed

19.0.9

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/11/GHSA-xqc2-xf4c-x3h3/GHSA-xqc2-xf4c-x3h3.json"

react-server-dom-turbopack

Package

Name: react-server-dom-turbopack; View open source insights on deps.dev
Purl: pkg:npm/react-server-dom-turbopack

Affected ranges

Type: SEMVER
Events: Introduced

19.1.0

Fixed

19.1.10

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/11/GHSA-xqc2-xf4c-x3h3/GHSA-xqc2-xf4c-x3h3.json"

react-server-dom-turbopack

Package

Name: react-server-dom-turbopack; View open source insights on deps.dev
Purl: pkg:npm/react-server-dom-turbopack

Affected ranges

Type: SEMVER
Events: Introduced

19.2.0

Fixed

19.2.9

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/11/GHSA-xqc2-xf4c-x3h3/GHSA-xqc2-xf4c-x3h3.json"

react-server-dom-turbopack

Package

Name: react-server-dom-turbopack; View open source insights on deps.dev
Purl: pkg:npm/react-server-dom-turbopack

Affected ranges

Type: SEMVER
Events: Introduced

19.3.0

Fixed

19.3.1

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/11/GHSA-xqc2-xf4c-x3h3/GHSA-xqc2-xf4c-x3h3.json"

react-server-dom-webpack

Package

Name: react-server-dom-webpack; View open source insights on deps.dev
Purl: pkg:npm/react-server-dom-webpack

Affected ranges

Type: SEMVER
Events: Introduced

19.0.0

Fixed

19.0.9

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/11/GHSA-xqc2-xf4c-x3h3/GHSA-xqc2-xf4c-x3h3.json"

react-server-dom-webpack

Package

Name: react-server-dom-webpack; View open source insights on deps.dev
Purl: pkg:npm/react-server-dom-webpack

Affected ranges

Type: SEMVER
Events: Introduced

19.1.0

Fixed

19.1.10

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/11/GHSA-xqc2-xf4c-x3h3/GHSA-xqc2-xf4c-x3h3.json"

react-server-dom-webpack

Package

Name: react-server-dom-webpack; View open source insights on deps.dev
Purl: pkg:npm/react-server-dom-webpack

Affected ranges

Type: SEMVER
Events: Introduced

19.2.0

Fixed

19.2.9

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/11/GHSA-xqc2-xf4c-x3h3/GHSA-xqc2-xf4c-x3h3.json"

react-server-dom-webpack

Package

Name: react-server-dom-webpack; View open source insights on deps.dev
Purl: pkg:npm/react-server-dom-webpack

Affected ranges

Type: SEMVER
Events: Introduced

19.3.0

Fixed

19.3.1

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/11/GHSA-xqc2-xf4c-x3h3/GHSA-xqc2-xf4c-x3h3.json"