CVE-2025-49826

HIGH

Next.js 15.0.4-15.1.8 - Denial of Service via HTTP 204 Response Cache Poisoning

Title source: llm
STIX 2.1

Description

Next.js is a React framework for building full-stack web applications. From versions 15.0.4-canary.51 to before 15.1.8, a cache poisoning bug leading to a Denial of Service (DoS) condition was found in Next.js. This issue does not impact customers hosted on Vercel. Under certain conditions, this issue may allow a HTTP 204 response to be cached for static pages, leading to the 204 response being served to all users attempting to access the page. This issue has been addressed in version 15.1.8.

References (4)

Core 4

Scores

CVSS v3 7.5
EPSS 0.0080
EPSS Percentile 51.6%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-444
Status published
Products (3)
npm/next 15.0.4-canary.51 - 15.1.8npm
vercel/next.js 15.0.4 canary51 (2 CPE variants)
vercel/next.js 15.0.4 - 15.1.8
Published Jul 03, 2025
Tracked Since Feb 18, 2026