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Copy file name to clipboardExpand all lines: src/content/blog/2025/12/03/critical-security-vulnerability-in-react-server-components.md
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@@ -62,45 +62,27 @@ An unauthenticated attacker could craft a malicious HTTP request to any Server F
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These instructions have been updated to include the new vulnerabilities:
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-**Denial of Service - High Severity**: [CVE-2025-55184](https://www.cve.org/CVERecord?id=CVE-2025-55184) and [CVE-2025-67779](https://www.cve.org/CVERecord?id=CVE-2025-67779) (CVSS 7.5)
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-**Denial of Service - High Severity**: [CVE-2025-55184](https://www.cve.org/CVERecord?id=CVE-2025-55184), [CVE-2025-67779](https://www.cve.org/CVERecord?id=CVE-2025-67779), and [CVE-2026-23869](https://www.cve.org/CVERecord?id=CVE-2026-23869) (CVSS 7.5)
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-**Source Code Exposure - Medium Severity**: [CVE-2025-55183](https://www.cve.org/CVERecord?id=CVE-2025-55183) (CVSS 5.3)
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-**Denial of Service - High Severity**: January 26, 2026 [CVE-2026-23864](https://www.cve.org/CVERecord?id=CVE-2026-23864) (CVSS 7.5)
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See the [follow-up blog post](/blog/2025/12/11/denial-of-service-and-source-code-exposure-in-react-server-components) for more info.
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-----
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_Updated January 26, 2026._
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_Updated April 8th, 2026._
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</Note>
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### Next.js {/*update-next-js*/}
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All users should upgrade to the latest patched version in their release line:
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```bash
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npm install next@14.2.35 // for 13.3.x, 13.4.x, 13.5.x, 14.x
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npm install next@15.0.8 // for 15.0.x
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npm install next@15.1.12 // for 15.1.x
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npm install next@15.2.9 // for 15.2.x
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npm install next@15.3.9 // for 15.3.x
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npm install next@15.4.11 // for 15.4.x
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npm install next@15.5.10 // for 15.5.x
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npm install next@16.0.11 // for 16.0.x
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npm install next@16.1.5 // for 16.1.x
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npm install next@15.6.0-canary.60 // for 15.x canary releases
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npm install next@16.1.0-canary.19 // for 16.x canary releases
If you are on version `13.3` or later version of Next.js 13 (`13.3.x`, `13.4.x`, or `13.5.x`) please upgrade to version `14.2.35`.
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If you are on `next@14.3.0-canary.77` or a later canary release, downgrade to the latest stable 14.x release:
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```bash
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npm install next@14
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```
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If you are on version `13.3` or later version of Next.js 13 (`13.3.x`, `13.4.x`, or `13.5.x`) or on any Next.js 14, please upgrade to version `15.5.15`.
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See the [Next.js blog](https://nextjs.org/blog/security-update-2025-12-11) for the latest update instructions and the [previous changelog](https://nextjs.org/blog/CVE-2025-66478) for more info.
Copy file name to clipboardExpand all lines: src/content/blog/2025/12/11/denial-of-service-and-source-code-exposure-in-react-server-components.md
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title: "Denial of Service and Source Code Exposure in React Server Components"
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author: The React Team
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date: 2025/12/11
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description: Security researchers have found and disclosed three additional vulnerabilities in React Server Components while attempting to exploit the patches in last week’s critical vulnerability. High vulnerability Denial of Service (CVE-2025-55184), high vulnerability Denial of Service (CVE-2026-23869), and medium vulnerability Source Code Exposure (CVE-2025-55183)
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description: Security researchers have found and disclosed two additional vulnerabilities in React Server Components while attempting to exploit the patches in last week’s critical vulnerability. High vulnerability Denial of Service (CVE-2025-55184), and medium vulnerability Source Code Exposure (CVE-2025-55183)
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<Intro>
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Security researchers have found and disclosed three additional vulnerabilities in React Server Components while attempting to exploit the patches in last week’s critical vulnerability.
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Security researchers have found and disclosed two additional vulnerabilities in React Server Components while attempting to exploit the patches in last week’s critical vulnerability.
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**These new vulnerabilities do not allow for Remote Code Execution.** The patch for React2Shell remains effective at mitigating the Remote Code Execution exploit.
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#### Additional fixes published {/*additional-fix-published*/}
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The original fix addressing the DoS in [CVE-2025-55184](https://www.cve.org/CVERecord?id=CVE-2025-55184)and [CVE-2025-67779](https://www.cve.org/CVERecord?id=CVE-2025-67779) were incomplete.
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The original fix addressing the DoS in [CVE-2025-55184](https://www.cve.org/CVERecord?id=CVE-2025-55184)was incomplete.
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This left previous versions vulnerable. Versions 19.0.5, 19.1.6, 19.2.5 are safe.
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