CVE-2025-49826
Next.js Cache Poisoning DoS Vulnerability
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.
INFO
Published Date :
July 3, 2025, 9:15 p.m.
Last Modified :
July 8, 2025, 4:19 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
3.9
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-49826.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-49826 vulnerability anywhere in the article.
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Cyber Security News
Next.js Cache Poisoning Vulnerability Let Attackers Trigger DoS Condition
Key Takeaways1. Next.js versions 15.1.0-15.1.8 have a cache poisoning bug causing DoS attacks through blank page delivery.2. Needs affected Next.js version + ISR with cache revalidation + SSR with CDN ... Read more
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Daily CyberSecurity
Next.js Flaw (CVE-2025-49826, CVSS 7.5): Cache Poisoning Leads to Denial-of-Service
A cache poisoning vulnerability (CVE-2025-49826) with a CVSS score of 7.5 has been disclosed in Next.js, the popular React-based web development framework. The flaw, found in versions >=15.1.0 <15.1.8 ... Read more
The following table lists the changes that have been made to the
CVE-2025-49826 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Modified by [email protected]
Jul. 03, 2025
Action Type Old Value New Value Changed Description Next.js is a React framework for building full-stack web applications. From versions 15.1.0 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. 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. -
New CVE Received by [email protected]
Jul. 03, 2025
Action Type Old Value New Value Added Description Next.js is a React framework for building full-stack web applications. From versions 15.1.0 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. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-444 Added Reference https://github.com/vercel/next.js/commit/a15b974ed707d63ad4da5b74c1441f5b7b120e93 Added Reference https://github.com/vercel/next.js/releases/tag/v15.1.8 Added Reference https://github.com/vercel/next.js/security/advisories/GHSA-67rr-84xm-4c7r Added Reference https://vercel.com/changelog/cve-2025-49826
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-49826 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-49826
weaknesses.