CVE-2025-49005

LOW EPSS 32.1%
Published Jul 3, 202512mo ago · Modified Jun 17, 20261w ago
3.7 CVSS 3.1
Low
Find Similar
Published Jul 3, 2025 12mo ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
3.7
Exploitability
2.2
Impact
1.4
Vector string
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
Attack Vector Network
Attack Complexity High
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity Low
Availability None

Threat Intelligence

EPSS Exploit Probability
32.1% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-444

Affected Products 2

VendorProductVersionRange
vercelnext.js*≥15.3.0  –  <15.3.3
vercelvercel*≥41.4.1  –  <42.2.0

References 5

  • github.com https://github.com/vercel/next.js/commit/ec202eccf05820b60c6126d6411fe16766ecc066
    Patch
  • github.com https://github.com/vercel/next.js/issues/79346
    ExploitIssue Tracking
  • github.com https://github.com/vercel/next.js/releases/tag/v15.3.3
    Release Notes
  • github.com https://github.com/vercel/next.js/security/advisories/GHSA-r2fc-ccr8-96c4
    Vendor Advisory
  • vercel.com https://vercel.com/changelog/cve-2025-49005
    Vendor Advisory

Remediation

  • github.com https://github.com/vercel/next.js/commit/ec202eccf05820b60c6126d6411fe16766ecc066
    Patch