Vulnerability Monitor

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CVE-2025-49826

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.

Published

2025-07-03T21:15:27.287

Last Modified

2025-09-10T15:28:32.130

Status

Analyzed

Source

[email protected]

Severity

CVSSv3.1: 7.5 (HIGH)

Weaknesses

Type: Secondary
CWE-444

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	vercel	next.js	< 15.1.8	Yes
Application	vercel	next.js	15.0.4	Yes
Application	vercel	next.js	15.0.4	Yes

References

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