CVE-2025-49005

Name: CVE-2025-49005
Creator: NVD / NIST
Published: 2025-07-03T21:15:26.787+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 3.7/10EPSS 0.40%

Last modified Jun 17, 2026

CVE-2025-49005 is a low-severity vulnerability rated 3.7/10 on the CVSS scale. 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. EPSS estimates a 0.40% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

3.7/10

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

EPSS Probability

0.40%

32.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-444

Affected Software

Vendor	Product	Versions
Vercel	Next.Js	>= 15.3.0, < 15.3.3
Vercel	Vercel	>= 41.4.1, < 42.2.0

References

https://github.com/vercel/next.js/commit/ec202eccf05820b60c6126d6411fe16766ecc066Patch
https://github.com/vercel/next.js/issues/79346Exploit, Issue Tracking
https://github.com/vercel/next.js/releases/tag/v15.3.3Release Notes
https://github.com/vercel/next.js/security/advisories/GHSA-r2fc-ccr8-96c4Vendor Advisory
https://vercel.com/changelog/cve-2025-49005Vendor Advisory
https://github.com/vercel/next.js/issues/79346Exploit, Issue Tracking

Timeline

Published: Jul 3, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-49005?

How severe is CVE-2025-49005?

CVE-2025-49005 has a CVSS score of 3.7/10 (LOW severity). The EPSS model estimates a 0.40% probability of exploitation in the next 30 days.

How do I fix CVE-2025-49005?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-49005?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST