CVE-2025-49826

Next.js DoS vulnerability via cache poisoning

Published Jul 3, 2025 CVSS 3.1 · 7.5 High EPSS 1.1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2025-19910 Next.JS vulnerability can lead to DoS via cache poisoning
Github GHSA Github GHSA GHSA-67rr-84xm-4c7r Next.JS vulnerability can lead to DoS via cache poisoning
History
Type Values Removed Values Added
CPEs cpe:2.3:a:vercel:next.js:*:*:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.0.4:canary51:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.0.4:canary52:*:*:*:node.js:*:*
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values 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. 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.
Type Values Removed Values 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.
Title Next.js DoS vulnerability via cache poisoning
Weaknesses CWE-444
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Jul 8, 2025, 2:33 PM
Reserved
Jun 11, 2025, 2:33 PM
Status
Analyzed
Published
Jul 3, 2025, 9:15 PM
Modified
Jun 17, 2026, 9:31 AM
Severity
Moderate
Public date
Jul 3, 2025, 9:03 PM