CVE-2025-49826

Published Jul 3, 2025

Last updated 6 months ago

CVSS high 7.5

React

Next.js

Overview

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.
Source: security-advisories@github.com
NVD status: Analyzed
Products: next.js

Risk scores

CVSS 3.1

Type: Secondary
Base score: 7.5
Impact score: 3.6
Exploitability score: 3.9
Vector string: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Severity: HIGH

Weaknesses

security-advisories@github.com: CWE-444

Hype score: Not currently trending

Configurations

[
  {
    "nodes": [
      {
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:a:vercel:next.js:*:*:*:*:*:node.js:*:*",
            "matchCriteriaId": "F50DAFB8-34A5-4452-8AF6-BAA3FD8B6C32",
            "versionEndExcluding": "15.1.8",
            "versionStartExcluding": "15.0.4",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:vercel:next.js:15.0.4:canary51:*:*:*:node.js:*:*",
            "matchCriteriaId": "CBF83B84-0DA2-481D-B7AD-2D7021C21AE9",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:vercel:next.js:15.0.4:canary52:*:*:*:node.js:*:*",
            "matchCriteriaId": "28634725-9D9F-4C0D-BA06-EDD16FFF445F",
            "vulnerable": true
          }
        ],
        "negate": false,
        "operator": "OR"
      }
    ]
  }
]

References

Sources include official advisories and independent security research.

Overview

Risk scores

CVSS 3.1

Weaknesses

Social media

Configurations

Related CVEs

References