CVE-2025-49826

HIGH EPSS 52.0%
Published Jul 3, 202512mo ago · Modified Jun 17, 20262w ago
7.5 CVSS 3.1
High
Find Similar
Published Jul 3, 2025 12mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
52.0% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-444

Affected Products 3

VendorProductVersionRange
vercelnext.js*>15.0.4  –  <15.1.8
vercelnext.js15.0.4any
vercelnext.js15.0.4any

References 4

  • github.com https://github.com/vercel/next.js/commit/a15b974ed707d63ad4da5b74c1441f5b7b120e93
    Patch
  • github.com https://github.com/vercel/next.js/releases/tag/v15.1.8
    Release Notes
  • github.com https://github.com/vercel/next.js/security/advisories/GHSA-67rr-84xm-4c7r
    Vendor Advisory
  • vercel.com https://vercel.com/changelog/cve-2025-49826
    Vendor Advisory

Remediation

  • github.com https://github.com/vercel/next.js/commit/a15b974ed707d63ad4da5b74c1441f5b7b120e93
    Patch