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CVE-2025-49005

nvd nist
Published: Jul 3, 2025Modified: Jun 17, 2026

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3.7
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
Exploitability: 2.2 / Impact: 1.4
Source: security-advisories@github.com (Secondary)

Description

Next.js is a React framework for building full-stack web applications. In Next.js App Router from 15.3.0 to before 15.3.3 and Vercel CLI from 41.4.1 to 42.2.0, a cache poisoning vulnerability was found. The issue allowed page requests for HTML content to return a React Server Component (RSC) payload instead under certain conditions. When deployed to Vercel, this would only impact the browser cache, and would not lead to the CDN being poisoned. When self-hosted and deployed externally, this could lead to cache poisoning if the CDN does not properly distinguish between RSC / HTML in the cache keys. This issue has been resolved in Next.js 15.3.3.

Affected (2)

Products: Vercel: Next.js, Vercel
Vercel
2 products
Next.js
Vercel
Configuration A
2 vulnerable
Vulnerable SoftwareAffected Versions
Next.js
From 15.3.0 to 15.3.3
Vercel
From 41.4.1 to 42.2.0

Related CWEs

CWE-444
Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
The product acts as an intermediary HTTP agent (such as a proxy or firewall) in the data flow between two entities such as a client and server, but it does not interpret malformed HTTP requests or responses in ways that are consistent with how the messages will be processed by those entities that are at the ultimate destination.

References (6)

Source: security-advisories@github.com
Patch
Source: security-advisories@github.com
ExploitIssue Tracking
Source: security-advisories@github.com
Release Notes
Source: security-advisories@github.com
Vendor Advisory
Source: security-advisories@github.com
Vendor Advisory
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
ExploitIssue Tracking

Timeline

No history available yet.