High severityNVD Advisory· Published Jul 3, 2025· Updated Jul 8, 2025
Next.js DoS vulnerability via cache poisoning
CVE-2025-49826
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
nextnpm | >= 15.0.4-canary.51, < 15.1.8 | 15.1.8 |
Affected products
2Patches
Vulnerability mechanics
References
7- github.com/advisories/GHSA-67rr-84xm-4c7rghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2025-49826ghsaADVISORY
- github.com/vercel/next.js/commit/16bfce64ef2157f2c1dfedcfdb7771bc63103fd2ghsaWEB
- github.com/vercel/next.js/commit/a15b974ed707d63ad4da5b74c1441f5b7b120e93ghsax_refsource_MISCWEB
- github.com/vercel/next.js/releases/tag/v15.1.8ghsax_refsource_MISCWEB
- github.com/vercel/next.js/security/advisories/GHSA-67rr-84xm-4c7rghsax_refsource_CONFIRMWEB
- vercel.com/changelog/cve-2025-49826ghsax_refsource_MISCWEB
News mentions
0No linked articles in our index yet.