Tuesday, August 11, 2026
LIVEThe Unrelenting Cyber Battle: Hacking Threats and the Imperative of Robust Data Protection///Navigating the Cyber Labyrinth: Bolstering Defenses Against Evolving Hacking Threats///The Dual Front War: Battling Hacking and Bolstering Data Protection in the Digital Age///The Ever-Evolving Cyber Threat Landscape: Navigating Hacking and Fortifying Data Protection///The Unseen Battle: Fortifying Data in an Age of Relentless Hacking///The Unseen War: Hacking's Relentless Advance and the Imperative of Data Protection///The Evolving Threat Landscape: Hacking, Data Protection, and the Imperative for Proactive Security///Navigating the Digital Minefield: Bolstering Data Protection in an Era of Relentless Hacking///The Dual Fronts of Digital Defense: Combating Hacking and Fortifying Data Protection///Hacking's New Frontier: Fortifying Data Protection in the Age of Advanced Cyber Threats///The Dual Front: Navigating Hacking Threats and Fortifying Data Protection in the Digital Age///Navigating the Digital Gauntlet: The Evolving Nexus of Hacking and Data Protection///The Unrelenting Cyber Battle: Hacking Threats and the Imperative of Robust Data Protection///Navigating the Cyber Labyrinth: Bolstering Defenses Against Evolving Hacking Threats///The Dual Front War: Battling Hacking and Bolstering Data Protection in the Digital Age///The Ever-Evolving Cyber Threat Landscape: Navigating Hacking and Fortifying Data Protection///The Unseen Battle: Fortifying Data in an Age of Relentless Hacking///The Unseen War: Hacking's Relentless Advance and the Imperative of Data Protection///The Evolving Threat Landscape: Hacking, Data Protection, and the Imperative for Proactive Security///Navigating the Digital Minefield: Bolstering Data Protection in an Era of Relentless Hacking///The Dual Fronts of Digital Defense: Combating Hacking and Fortifying Data Protection///Hacking's New Frontier: Fortifying Data Protection in the Age of Advanced Cyber Threats///The Dual Front: Navigating Hacking Threats and Fortifying Data Protection in the Digital Age///Navigating the Digital Gauntlet: The Evolving Nexus of Hacking and Data Protection///
Subscribe
Cyber Security
Independent · Digital
Thehackingpost
RSSSubscribe
CybersecurityAI-assisted

Critical React and Next.js Enables Remote Attackers to Execute Malicious Code

A critical security vulnerability has been identified in React and Next.js, which allows remote attackers to execute malicious code on servers without authentication. This vulnerability affects React Server Components (RSC) and the "Flight" protocol used…

PBy Paige MonroeDec 04, 20251 min read

A critical security vulnerability has been identified in React and Next.js, which allows remote attackers to execute malicious code on servers without authentication. This vulnerability affects React Server Components (RSC) and the "Flight" protocol used for data exchange between the browser and server.

The vulnerabilities are tracked as CVE-2025-55182 for React and CVE-2025-66478 for Next.js. Both are rated at the highest severity level, enabling unauthenticated remote code execution.

Exploitation of this flaw involves sending a specially crafted HTTP request to a vulnerable server. The root issue lies in insecure deserialization during the processing of the RSC "Flight" payload. When the server processes a malicious payload, it fails to verify its structure properly, allowing attacker-controlled data to interfere with the server's execution flow, thereby executing privileged JavaScript code.

CVE ID Product Vulnerable Versions CVSS Score

CVE-2025-55182 react-server-dom-webpack 19.0.0, 19.1.0, 19.1.1, 19.2.0 10.0

This vulnerability affects React Server Components (RSC) and the "Flight" protocol used for data exchange between the browser and server.
Paige Monroe · Thehackingpost

CVE-2025-55182 react-server-dom-parcel 19.0.0, 19.1.0, 19.1.1, 19.2.0 10.0

CVE-2025-55182 react-server-dom-turbopack 19.0.0, 19.1.0, 19.1.1, 19.2.0 10.0

CVE-2025-66478 Next.js 14.3.0-canary, 15.x, 16.x (App Router) 10.0

Default setups are vulnerable, and even a standard Next.js application created with create-next-app and built for production without modifications can be exploited.

Advertisement

React has released patches in versions 19.0.1, 19.1.2, and 19.2.1 of the react-server-dom packages. Next.js has also issued hardened releases across supported branches. Other frameworks or bundlers incorporating the vulnerable React server implementation, such as React Router RSC, Vite, and Parcel RSC plugins, as well as RedwoodSDK and Waku, are likely affected. It is crucial for security teams to promptly upgrade React, Next.js, and all related RSC-enabled dependencies.

While hosting provider mitigations may reduce risk, they should not replace the implementation of patches. Until systems are fully updated, any exposed React Server Component deployment should be regarded as high-risk for compromise.

Based on reporting by Cyber Security News.

AI transparency. This article was produced with the assistance of artificial intelligence and published under human editorial oversight. AI systems can make mistakes. Read how we use AI (EU AI Act, Art. 50).
Related Stories
Cybersecurity

Why Fintech Banking Platforms Are Reducing Operational Costs by 40%

Paige Monroe · Mar 26, 2026
Cybersecurity

Dogecoin Price Prediction: SHIB Burns 172M Tokens as Pepeto Exchange Earns From Every Trade

Eric Wallace · Mar 26, 2026
Cybersecurity

Solana Price Prediction: SOL Holds $86 With Commodity Status as Pepeto Targets Bigger Returns

Zachary Burns · Mar 26, 2026
Cybersecurity

Open Directory Malware Campaign Uses Obfuscated VBS, PNG Loaders and RAT Payloads

Joseph Cain · Mar 26, 2026