CVE-2025-49826
Next.JS vulnerability can lead to DoS via cache poisoning
Description
### Summary A vulnerability affecting Next.js has been addressed. It impacted versions 15.0.4 through 15.1.8 and involved a cache poisoning bug leading to a Denial of Service (DoS) condition. 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 More details: [CVE-2025-49826](https://vercel.com/changelog/cve-2025-49826) ## Credits - Allam Rachid [zhero;](https://zhero-web-sec.github.io/research-and-things/) - Allam Yasser (inzo)
How to fix CVE-2025-49826
To remediate CVE-2025-49826, upgrade the affected package to a fixed version below.
- —upgrade to 15.1.8 or later
Is CVE-2025-49826 being exploited?
Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- >= 15.0.4-canary.51, < 15.1.8
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |