Security | Threat Detection | Cyberattacks | DevSecOps | Compliance

A Critical Remote Code Execution (RCE) vulnerability, identified as CVE-2025-55182, has been discovered in Next.js applications utilizing React Server Components (RSC) and Server Actions. This vulnerability stems from insecure deserialization within the underlying “Flight” protocol used by React. Unauthenticated remote attackers can exploit this flaw to execute arbitrary code on the server, potentially leading to a complete compromise of the application and underlying system.

Many organizations set remediation SLAs, but static severity-based timelines and manual tracking prevent them from meeting those deadlines in a way that meaningfully reduces risk. This article outlines how automated, risk-based SLAs connect timelines to real exploitability, exposure, and asset value, turning deadlines into reliable, measurable outcomes. Key takeaways from this article.

While the world worries about "jailbreaking" LLMs or preventing them from hallucinating, a critical new vulnerability has just reminded us of a fundamental truth: AI is just software, and software has bugs. A newly discovered critical flaw (CVE-2025-62164) in vLLM, one of the most popular libraries for serving large language models, allows attackers to achieve Remote Code Execution (RCE) or crash servers simply by sending a malicious API request. This isn't a failure of the AI model.

JFrog continues to track and provide updates on React2Shell at research.jfrog.com.

On December 3rd, CVE-2025-55182 was published by CISA. This CVSS 10.0 vulnerability allows unauthenticated remote code execution, where a threat actor can exploit a flaw in React’s process to decode payloads sent to React Server Function endpoints. It is important to note that while not every team is using React Server Function endpoints in their app, they still may be vulnerable if their app supports React Server Components.

On December 3, 2025, React maintainers disclosed a critical unauthenticated remote code execution (RCE) vulnerability in React Server Components (RSC), tracked as CVE-2025-55182. A working PoC was released publicly, and Wallarm immediately began observing widespread exploitation attempts across customer environments.

On December 3, 2025, the React team released fixes for a maximum severity vulnerability in React Server Components (RSC). The vulnerability, tracked as CVE-2025-55182, stems from unsafe handling of serialized DOM elements, allowing for remote code execution in React 19 and other frameworks built on top of it, such as Next.js 15–16. The vulnerability was responsibly disclosed to React as part of a bug bounty program and is not known to be actively exploited in the wild at this time.

A critical vulnerability, CVE-2025-66478, has been identified in Next.js applications using React Server Components (RSC) with the App Router. This vulnerability receives a CVSS score of 10.0 and a Bitsight Dynamic Vulnerability Exploit (DVE) score of 7.85. This vulnerability may allow remote code execution (RCE) when affected servers process attacker-controlled RSC requests. CVE-2025-66478 is tied to an upstream React issue (CVE-2025-55182–DVE score 9.15) affecting the RSC protocol implementation.