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1 vulnerability found for react by react
CVE-2026-126187 (GCVE-0-2026-126187)
Vulnerability from cvelistv5 – Published: 2026-11-10 22:33 – Updated: 2026-11-10 22:33
VLAI
EPSS
VEX
Title
React: Unauthenticated Remote Code Execution in React Server Components
Summary
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.
Severity
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
15 references
| URL | Tags |
|---|---|
| https://github.com/react/react/security/advisorie… | x_refsource_CONFIRM |
| https://github.com/react/react/pull/37842 | x_refsource_MISC |
| https://github.com/react/react/pull/37843 | x_refsource_MISC |
| https://github.com/react/react/pull/37844 | x_refsource_MISC |
| https://github.com/react/react/pull/37845 | x_refsource_MISC |
| https://github.com/react/react/pull/37846 | x_refsource_MISC |
| https://github.com/react/react/commit/0c9913ae872… | x_refsource_MISC |
| https://github.com/react/react/commit/249ac87b0da… | x_refsource_MISC |
| https://github.com/react/react/commit/3d06b4005ac… | x_refsource_MISC |
| https://github.com/react/react/commit/611d9217df3… | x_refsource_MISC |
| https://github.com/react/react/commit/61aa00df822… | x_refsource_MISC |
| https://github.com/react/react/releases/tag/v19.0.9 | x_refsource_MISC |
| https://github.com/react/react/releases/tag/v19.1.10 | x_refsource_MISC |
| https://github.com/react/react/releases/tag/v19.2.9 | x_refsource_MISC |
| https://github.com/react/react/releases/tag/v19.3.1 | x_refsource_MISC |
Impacted products
{
"containers": {
"cna": {
"affected": [
{
"product": "react",
"vendor": "react",
"versions": [
{
"status": "affected",
"version": "\u003e= 19.0.0, \u003c 19.0.9"
},
{
"status": "affected",
"version": "\u003e= 19.1.0, \u003c 19.1.10"
},
{
"status": "affected",
"version": "\u003e= 19.2.0, \u003c 19.2.9"
},
{
"status": "affected",
"version": "\u003e= 19.3.0, \u003c 19.3.1"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "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."
}
],
"metrics": [
{
"cvssV4_0": {
"attackComplexity": "LOW",
"attackRequirements": "PRESENT",
"attackVector": "NETWORK",
"baseScore": 9.5,
"baseSeverity": "CRITICAL",
"privilegesRequired": "NONE",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "HIGH",
"subIntegrityImpact": "HIGH",
"userInteraction": "NONE",
"vectorString": "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",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "HIGH",
"vulnIntegrityImpact": "HIGH"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-502",
"description": "CWE-502: Deserialization of Untrusted Data",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-11-10T22:33:57.528Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/react/react/security/advisories/GHSA-xqc2-xf4c-x3h3",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/react/react/security/advisories/GHSA-xqc2-xf4c-x3h3"
},
{
"name": "https://github.com/react/react/pull/37842",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/react/react/pull/37842"
},
{
"name": "https://github.com/react/react/pull/37843",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/react/react/pull/37843"
},
{
"name": "https://github.com/react/react/pull/37844",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/react/react/pull/37844"
},
{
"name": "https://github.com/react/react/pull/37845",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/react/react/pull/37845"
},
{
"name": "https://github.com/react/react/pull/37846",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/react/react/pull/37846"
},
{
"name": "https://github.com/react/react/commit/0c9913ae87283f96e868a8f1c20a3389827632d0",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/react/react/commit/0c9913ae87283f96e868a8f1c20a3389827632d0"
},
{
"name": "https://github.com/react/react/commit/249ac87b0dadea4ba024d1393e5cb60cf1186080",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/react/react/commit/249ac87b0dadea4ba024d1393e5cb60cf1186080"
},
{
"name": "https://github.com/react/react/commit/3d06b4005ac0cf9dec37267f26174adfe6d83611",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/react/react/commit/3d06b4005ac0cf9dec37267f26174adfe6d83611"
},
{
"name": "https://github.com/react/react/commit/611d9217df39cf7b8ac91b2e41fd00555923e904",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/react/react/commit/611d9217df39cf7b8ac91b2e41fd00555923e904"
},
{
"name": "https://github.com/react/react/commit/61aa00df822d0eb76d0362eb8b6fdd3527693efe",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/react/react/commit/61aa00df822d0eb76d0362eb8b6fdd3527693efe"
},
{
"name": "https://github.com/react/react/releases/tag/v19.0.9",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/react/react/releases/tag/v19.0.9"
},
{
"name": "https://github.com/react/react/releases/tag/v19.1.10",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/react/react/releases/tag/v19.1.10"
},
{
"name": "https://github.com/react/react/releases/tag/v19.2.9",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/react/react/releases/tag/v19.2.9"
},
{
"name": "https://github.com/react/react/releases/tag/v19.3.1",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/react/react/releases/tag/v19.3.1"
}
],
"source": {
"advisory": "GHSA-xqc2-xf4c-x3h3",
"discovery": "UNKNOWN"
},
"title": "React: Unauthenticated Remote Code Execution in React Server Components"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-126187",
"datePublished": "2026-11-10T22:33:57.528Z",
"dateReserved": "2026-11-10T20:07:44.956Z",
"dateUpdated": "2026-11-10T22:33:57.528Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}