{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-126187",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-11-10T20:07:44.956Z",
        "datePublished": "2026-11-10T22:33:57.528Z",
        "dateUpdated": "2026-11-10T22:33:57.528Z"
    },
    "containers": {
        "cna": {
            "title": "React: Unauthenticated Remote Code Execution in React Server Components",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-502",
                            "lang": "en",
                            "description": "CWE-502: Deserialization of Untrusted Data",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "attackRequirements": "PRESENT",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "HIGH",
                        "vulnIntegrityImpact": "HIGH",
                        "vulnAvailabilityImpact": "HIGH",
                        "subConfidentialityImpact": "HIGH",
                        "subIntegrityImpact": "HIGH",
                        "subAvailabilityImpact": "NONE",
                        "baseScore": 9.5,
                        "baseSeverity": "CRITICAL",
                        "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"
                    }
                }
            ],
            "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"
                }
            ],
            "affected": [
                {
                    "vendor": "react",
                    "product": "react",
                    "versions": [
                        {
                            "version": ">= 19.0.0, < 19.0.9",
                            "status": "affected"
                        },
                        {
                            "version": ">= 19.1.0, < 19.1.10",
                            "status": "affected"
                        },
                        {
                            "version": ">= 19.2.0, < 19.2.9",
                            "status": "affected"
                        },
                        {
                            "version": ">= 19.3.0, < 19.3.1",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-11-10T22:33:57.528Z"
            },
            "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."
                }
            ],
            "source": {
                "advisory": "GHSA-xqc2-xf4c-x3h3",
                "discovery": "UNKNOWN"
            }
        }
    }
}