CVE-2025-49826
nextjs: Next.js denial of service
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · July 4, 2025
Updated · September 23, 2026
Description
A denial of service flaw was found in Next.js. In certain situations, this issue may lead to an HTTP 204 response being cached for static pages, which can result in the 204 response being provided to all users trying to access the page.
Statement
This flaw will only affect the availability of services that use Next.js and not the host operating system itself.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
CVSS / CWE
CVSS 3.1 · 5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CWE-444 · Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')