CVE-2026-76844

webpack-dev-middleware resolves a request to a local file in getFilenameFromUrl by testing the request pathname against a traversal guard and then slicing it at a fixed character offset. The guard, UPPATHREGEXP applied to path.normalize./$pathname, only matches ".." that stands as a whole path...

CVE-2026-76844

webpack-dev-middleware suffers from a path traversal vulnerability in its getFilenameFromUrl function, an incomplete fix for CVE-2024-29180 . When publicPath is configured without a trailing slash, a crafted request (e.g., GET /assets../.env against publicPath /assets) bypasses the UP_PATH_REGEXP...

PT-2026-80854

Name of the Vulnerable Software and Affected Versions webpack-dev-middleware versions 5.3.4 through 5.x webpack-dev-middleware versions 6.1.2 through 6.x webpack-dev-middleware versions 7.1.0 through 7.x Description The software fails to sufficiently validate URL addresses before returning local...

Denial Of Service (DoS)

webpack-dev-middleware is vulnerable to denial of service. A memory leak occurs when the function writeToDisk is used, causing the compile-time to keep increasing as the duplicates write to disk keep increasing, eventually leading to a denial of service condition...