Authentication Bypass Using an Alternate Path or Channel Affecting next package, versions >=15.4.0-canary.0 <15.5.16>=16.0.0-beta.0 <16.2.5
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JS-NEXT-16638679
- published11 May 2026
- disclosed11 May 2026
- creditUnknown
Introduced: 11 May 2026
NewCVE-2026-44574 (opens in a new tab)How to fix?
Upgrade next to version 15.5.16, 16.2.5 or higher.
Overview
next is a react framework.
Affected versions of this package are vulnerable to Authentication Bypass Using an Alternate Path or Channel via dynamic full-route RSC requests in the deployment adapter. An attacker can gain unauthorized access to protected content by injecting a URL with query params that got misclassified by the onCacheEntryV2 callback as HTML, bypassing expected authorization checks.