{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-23864", "assignerOrgId": "4fc57720-52fe-4431-a0fb-3d2c8747b827", "state": "PUBLISHED", "assignerShortName": "Meta", "dateReserved": "2026-01-16T19:49:26.309Z", "datePublished": "2026-01-26T19:16:38.250Z", "dateUpdated": "2026-01-26T20:26:45.709Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "product": "react-server-dom-webpack", "vendor": "Meta", "versions": [{"lessThan": "19.0.4", "status": "affected", "version": "19.0.0", "versionType": "semver"}, {"lessThan": "19.1.5", "status": "affected", "version": "19.1.0", "versionType": "semver"}, {"lessThan": "19.2.4", "status": "affected", "version": "19.2.0", "versionType": "semver"}]}, {"defaultStatus": "unaffected", "product": "react-server-dom-turbopack", "vendor": "Meta", "versions": [{"lessThan": "19.0.4", "status": "affected", "version": "19.0.0", "versionType": "semver"}, {"lessThan": "19.1.5", "status": "affected", "version": "19.1.0", "versionType": "semver"}, {"lessThan": "19.2.4", "status": "affected", "version": "19.2.0", "versionType": "semver"}]}, {"defaultStatus": "unaffected", "product": "react-server-dom-parcel", "vendor": "Meta", "versions": [{"lessThan": "19.0.4", "status": "affected", "version": "19.0.0", "versionType": "semver"}, {"lessThan": "19.1.5", "status": "affected", "version": "19.1.0", "versionType": "semver"}, {"lessThan": "19.2.4", "status": "affected", "version": "19.2.0", "versionType": "semver"}]}], "descriptions": [{"lang": "en", "value": "Multiple denial of service vulnerabilities exist in React Server Components, affecting the following packages: react-server-dom-parcel, react-server-dom-turbopack, react-server-dom-webpack.\n\nThe vulnerabilities are triggered by sending specially crafted HTTP requests to Server Function endpoints, and could lead to server crashes, out-of-memory exceptions or excessive CPU usage; depending on the vulnerable code path being exercised, the application configuration and application code.\n\nStrongly consider upgrading to the latest package versions to reduce risk and prevent availability issues in applications using React Server Components."}], "problemTypes": [{"descriptions": [{"description": "(CWE-502): Deserialization of Untrusted Data. (CWE-400): Uncontrolled Resource Consumption", "lang": "en"}]}], "providerMetadata": {"orgId": "4fc57720-52fe-4431-a0fb-3d2c8747b827", "shortName": "Meta", "dateUpdated": "2026-01-26T19:16:38.250Z"}, "references": [{"tags": ["x_refsource_CONFIRM"], "url": "https://www.facebook.com/security/advisories/cve-2026-23864"}]}, "adp": [{"problemTypes": [{"descriptions": [{"type": "CWE", "cweId": "CWE-502", "lang": "en", "description": "CWE-502 Deserialization of Untrusted Data"}]}, {"descriptions": [{"type": "CWE", "cweId": "CWE-400", "lang": "en", "description": "CWE-400 Uncontrolled Resource Consumption"}]}], "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2026-01-26T20:26:03.428817Z", "id": "CVE-2026-23864", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-01-26T20:26:45.709Z"}}]}}

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{"bugzilla": {"description": "react-server-dom-webpack: react-server-dom-parcel: reactreact-server-dom-turbopack: React Server Components: Denial of Service via specially crafted HTTP requests", "id": "2433059", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2433059"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-1284", "details": ["Multiple denial of service vulnerabilities exist in React Server Components, affecting the following packages: react-server-dom-parcel, react-server-dom-turbopack, react-server-dom-webpack.\nThe vulnerabilities are triggered by sending specially crafted HTTP requests to Server Function endpoints, and could lead to server crashes, out-of-memory exceptions or excessive CPU usage; depending on the vulnerable code path being exercised, the application configuration and application code.\nStrongly consider upgrading to the latest package versions to reduce risk and prevent availability issues in applications using React Server Components.", "A flaw was found in React Server Components. A remote attacker can exploit this vulnerability by sending specially crafted HTTP requests to Server Function endpoints. This can lead to a Denial of Service (DoS), causing server crashes, out-of-memory exceptions, or excessive CPU usage, thereby impacting the availability of applications."], "name": "CVE-2026-23864", "package_state": [{"cpe": "cpe:/a:redhat:amq_streams:2", "fix_state": "Affected", "package_name": "com.github.streamshub-console", "product_name": "streams for Apache Kafka 2"}, {"cpe": "cpe:/a:redhat:amq_streams:3", "fix_state": "Affected", "package_name": "com.github.streamshub-console", "product_name": "streams for Apache Kafka 3"}], "public_date": "2026-01-26T19:16:38Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-23864\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-23864\nhttps://github.com/facebook/react/security/advisories/GHSA-83fc-fqcc-2hmg\nhttps://www.facebook.com/security/advisories/cve-2026-23864"], "threat_severity": "Important"}

{"analysis": {"en": {"generated_at": "2026-04-18T02:38:59.764565+00:00", "value": {"mitigation_remediation": ["Upgrade react\u2011server\u2011dom\u2011parcel, react\u2011server\u2011dom\u2011turbopack and react\u2011server\u2011dom\u2011webpack to the latest released versions that contain the fix.", "Deploy resource limits such as container CPU and memory quotas or system ulimits to mitigate over\u2011consumption of resources.", "Enable monitoring of CPU, memory, and request logs, and configure alerts to detect abnormal spikes or repeated error patterns in Server Function handling."], "summary": {"action": "Patch Now", "impact": "Denial of Service"}, "threat_synthesis": {"affected_systems": "The affected packages are react\u2011server\u2011dom\u2011parcel, react\u2011server\u2011dom\u2011turbopack, and react\u2011server\u2011dom\u2011webpack, all provided by Meta (Facebook). Any application utilizing these packages as part of React Server Components is susceptible. Versions of these packages under the vulnerability are not listed in the advisory, so all installations should be reviewed.", "description_and_impact": "The vulnerability involves multiple denial\u2011of\u2011service flaws in React Server Components. By sending specially crafted HTTP requests to Server Function endpoints, an attacker can trigger server crashes, out\u2011of\u2011memory errors, or excessive CPU usage. This flaw depends on the specific code path executed and the application configuration, leading to availability loss and resource exhaustion.", "risk_and_exploitability": "The CVSS score of 7.5 marks the issue as high\u2011severity. The EPSS score of 1% indicates that zero\u2011day exploitation is currently unlikely, and the vulnerability is not listed in the CISA KEV catalog. Nevertheless, an attacker can exploit the flaw by sending crafted HTTP requests to Server Function endpoints over the network, potentially exhausting CPU or memory resources and causing service disruption."}}}}, "created": "2026-01-27T09:03:35.608602+00:00", "updated": "2026-04-18T02:45:27.283404+00:00", "vendors": ["facebook", "facebook$PRODUCT$react-server-dom-parcel", "facebook$PRODUCT$react-server-dom-turbopack", "facebook$PRODUCT$react-server-dom-webpack"]}