Low severity · published Jul 3, 2025
CVE-2025-49005
Next.js is a React framework for building full-stack web applications
3.7
CVSS
0.5%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 42% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NE
Next.js · Vercel
15.3.0 before 15.3.3 · source: NVD
VE
Vercel · Vercel
41.4.1 before 42.2.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-49005
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-49005
Patch
https://github.com/vercel/next.js/commit/ec202eccf05820b60c6126d6411fe16766ecc066
Exploit
https://github.com/vercel/next.js/issues/79346
Release Notes
https://github.com/vercel/next.js/releases/tag/v15.3.3
Vendor Advisory
https://github.com/vercel/next.js/security/advisories/GHSA-r2fc-ccr8-96c4
Vendor Advisory
https://vercel.com/changelog/cve-2025-49005
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