CVE-2026-39365 Details.
Vite Dev Server - Path Traversal in Optimized Deps .map Handling
Atlas does not check this one. Needs a scripted sequence.
This check is a series of requests where each step depends on the last, often after logging in. Atlas runs single, read-only probes, so it does not run this one.
About CVE-2026-39365. What It Means.
Vite development server versions prior to 8.0.5, 7.3.2, and 6.4.2 are vulnerable to path traversal through the optimized dependencies sourcemap handler. The dev server's handling of .map requests for optimized dependencies resolves file paths via normalizePath(path.resolve(root, url.slice(1))) and calls readFile without restricting ../ segments in the URL. This allows an attacker to bypass server.fs.strict and retrieve auto-generated sourcemaps for files located outside the…
Affected Product. What Is Hit.
The record for CVE-2026-39365 does not name a vendor or product yet.
FAQ
Common Questions.
Vite Dev Server - Path Traversal in Optimized Deps .map Handling. Vite development server versions prior to 8.0.5, 7.3.2, and 6.4.2 are vulnerable to path traversal through the optimized dependencies sourcemap handler. The dev server's handling of .map requests for optimized dependencies resolves file paths via normalizePath(path.resolve(root, url.slice(1))) and calls readFile without restricting ../ segments in the URL. This allows an attacker to bypass server.fs.strict and retrieve auto-generated sourcemaps for files located outside the…
No. This check is a series of requests where each step depends on the last, often after logging in. Atlas runs single, read-only probes, so it does not run this one. The facts about CVE-2026-39365 are on this page, and you can request a demo to see how Brandefense watches your whole external attack surface.
CVE-2026-39365 is not on the CISA Known Exploited Vulnerabilities list at the time of writing, but it is still worth fixing.
Update the affected software to the latest version from the vendor, or follow the vendor's advice to switch off the affected feature. Vendor links are listed on this page when they are known.
This page lists the public facts about CVE-2026-39365. Atlas does not run a check for it, so nothing here says whether a particular site is affected.