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CVE-2026-44574 is an authorization bypass vulnerability in Next.js affecting App Router applications that rely on middleware to protect dynamic routes. In vulnerable versions, specially crafted query parameters can influence the dynamic route value resolved by the page handler while the visible request path used by middleware remains unchanged. This creates a trust-boundary mismatch between middleware authorization decisions and the route parameters ultimately consumed by the application. As a result, a request can appear to target an allowed public path while the page is resolved as protected dynamic content, allowing unauthorized rendering of content that should have been gated by middleware checks.
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No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
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15 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An authorization bypass vulnerability in Next.js affecting applications that use middleware to protect dynamic routes. Specially crafted query parameters can manipulate the dynamic route value seen by the page while bypassing the expected middleware authorization check.
A Next.js middleware authorization bypass in the App Router caused by trust boundary mismatch between middleware path inspection and App Router handling of internal routing parameters, allowing protected dynamic route content to be rendered without authorization.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.