Answer in brief
CVE-2026-23864 records a High severity (CVSS 7.5) vulnerability in CISA ADP Vulnrichment. The current sources do not mark it as known exploited. The current feed maps Meta/react-server-dom-parcel (generic), Meta/react-server-dom-turbopack (generic), Meta/react-server-dom-webpack (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Meta/react-server-dom-parcel (generic), Meta/react-server-dom-turbopack (generic), Meta/react-server-dom-webpack (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Meta/react-server-dom-parcelgeneric | >=19.0.0 <19.0.4 || >=19.1.0 <19.1.5 || >=19.2.0 <19.2.4 | 19.0.4, 19.1.5, 19.2.4 |
| Meta/react-server-dom-turbopackgeneric | >=19.0.0 <19.0.4 || >=19.1.0 <19.1.5 || >=19.2.0 <19.2.4 | 19.0.4, 19.1.5, 19.2.4 |
| Meta/react-server-dom-webpackgeneric | >=19.0.0 <19.0.4 || >=19.1.0 <19.1.5 || >=19.2.0 <19.2.4 | 19.0.4, 19.1.5, 19.2.4 |
Published upstream
Jan 26, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jul 3, 2026
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. The 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. Strongly consider upgrading to the latest package versions to reduce risk and prevent availability issues in applications using React Server Components.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-23864 records a High severity (CVSS 7.5) vulnerability in CISA ADP Vulnrichment. The current sources do not mark it as known exploited. The current feed maps Meta/react-server-dom-parcel (generic), Meta/react-server-dom-turbopack (generic), Meta/react-server-dom-webpack (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Meta/react-server-dom-parcel (generic), Meta/react-server-dom-turbopack (generic), Meta/react-server-dom-webpack (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Meta/react-server-dom-parcelgeneric | >=19.0.0 <19.0.4 || >=19.1.0 <19.1.5 || >=19.2.0 <19.2.4 | 19.0.4, 19.1.5, 19.2.4 |
| Meta/react-server-dom-turbopackgeneric | >=19.0.0 <19.0.4 || >=19.1.0 <19.1.5 || >=19.2.0 <19.2.4 | 19.0.4, 19.1.5, 19.2.4 |
| Meta/react-server-dom-webpackgeneric | >=19.0.0 <19.0.4 || >=19.1.0 <19.1.5 || >=19.2.0 <19.2.4 | 19.0.4, 19.1.5, 19.2.4 |
Published upstream
Jan 26, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jul 3, 2026
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. The 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. Strongly consider upgrading to the latest package versions to reduce risk and prevent availability issues in applications using React Server Components.
Quoted source text, attributed separately from HOL analysis.