CVE-2025-55184
highpriority · track · 33EPSS 0.666 · 99 %ileexploit · PoCDEEUNLUSEPSS · scored 2026-10-27
A pre-authentication denial of service vulnerability exists in React Server Components versions 19.0.0, 19.0.1 19.1.0, 19.1.1, 19.1.2, 19.2.0 and 19.2.1, including the following packages: react-server-dom-parcel, react-server-dom-turbopack, and react-server-dom-webpack. The vulnerable code unsafely deserializes payloads from HTTP requests to Server Function endpoints, which can cause an infinite loop that hangs the server process and may prevent future HTTP requests from being served.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
exploits (9)
Public proof-of-concept and weaponised exploit code.
- KingHacker353/CVE-2025-55184KingHacker353/CVE-2025-55184PoC · poc_in_github
- KkHackingLearning/CVE-2025-55184_TestingPython script for Testing CVE-2025-55184 PoC · poc_in_github
- Tarekhshaikh13/CVE-2025-55184Target Code + ExploitPoC · poc_in_github
- bakhod1r/CVE-2025-55184bakhod1r/CVE-2025-55184PoC · poc_in_github
affected products (36)
Products and version ranges known to be affected.
advisories (4)
Vendor and ecosystem advisories describing this.
- NCSC-2025-0394Kwetsbaarheden verholpen in React Server ComponentsNL2025-12-12csaf · ncsc_nlNL
Meta heeft kwetsbaarheden verholpen in React Server Components Parcel, Turbopack en Webpack.
- WID-SEC-W-2025-2835Vercel Next.js und React Server Components: Mehrere SchwachstellenDeutsch2025-12-11csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Vercel Next.js und React Server Components ausnutzen, um Informationen offenzulegen und um einen Denial of Service Angriff durchzuführen.
- WID-SEC-W-2026-3046IBM Concert: Mehrere SchwachstellenDeutsch2026-08-26csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in IBM Concert ausnutzen, um beliebigen Programmcode auszuführen, um einen Denial of Service Angriff durchzuführen, um Informationen offenzulegen, um Dateien zu manipulieren, um einen Cross-Site Scripting Angriff durchzuführen, um einen SQL-Injection Angriff durchzuführen und um Sicherheitsvorkehrungen zu umgehen.
- GHSA-2m3v-v2m8-q956Denial of Service Vulnerability in React Server Components2025-12-11ghsa · osvUS
## Impact There is a denial of service vulnerability in React Server Components. React recommends updating immediately. The vulnerability exists in versions 19.0.0, 19.0.1 19.1.0, 19.1.1, 19.1.2, 19.2.0 and 19.2.1 of: - [react-server-dom-webpack](https://www.npmjs.com/package/react-server-dom-webpack) - [react-server-dom-parcel](https://www.npmjs.com/package/react-server-dom-parcel) - [react-server-dom-turbopack](https://www.npmjs.com/package/react-server-dom-turbopack?activeTab=readme) These issues are present in the patches published last week. ## Patches Fixes were back ported to versions 19.0.2, 19.1.3, and 19.2.2. If you are using any of the above packages please upgrade to any of the fixed versions immediately. If your app’s React code does not use a server, your app is not affected by this vulnerability. If your app does not use a framework, bundler, or bundler plugin that supports React Server Components, your app is not affected by this vulnerability. ## References See the [blog post](https://react.dev/blog/2025/12/11/denial-of-service-and-source-code-exposure-in-react-server-components) for more information and upgrade instructions.
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (9)
External citations — patches, advisories, analysis.
- https://react.dev/blog/2025/12/03/critical-security-vulnerability-in-react-server-components#update-instructionsPatchcnnvd
- https://react.dev/blog/2025/12/11/denial-of-service-and-source-code-exposure-in-react-server-componentscnnvd
- https://vigilance.fr/vulnerability/React-denial-of-service-via-Server-Components-49088cnnvd
- https://www.facebook.com/security/advisories/cve-2025-55184cnnvd
- https://react.dev/blog/2025/12/11/denial-of-service-and-source-code-exposure-in-react-server-componentsenisa_euvd
- https://www.facebook.com/security/advisories/cve-2025-55184enisa_euvd
- https://github.com/KingHacker353/CVE-2025-55184nvd
- https://react.dev/blog/2025/12/11/denial-of-service-and-source-code-exposure-in-react-server-componentsVendor Advisorynvd
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