6.5

CVE-2026-42091

Exploit

goshs has Cross-Origin Arbitrary File Write via Missing CSRF on PUT and Wildcard CORS

goshs is a SimpleHTTPServer written in Go. Prior to version 2.0.2, the PUT upload handler (httpserver/updown.go) lacks the CSRF token validation that was added to the POST upload handler during the CVE-2026-40883 fix. Combined with the unconditional Access-Control-Allow-Origin: * on the OPTIONS preflight handler (httpserver/server.go), any website can write arbitrary files to a goshs instance through the victim's browser — bypassing network isolation (e.g. localhost, internal network). This issue has been patched in version 2.0.2.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Goshs ≫ Goshs SwPlatformgo Version < 2.0.2
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.17% 0.06
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
security-advisories@github.com 6.5 2.8 3.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
CWE-352 Cross-Site Request Forgery (CSRF)

The web application does not, or can not, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request.

https://github.com/patrickhener/goshs/security/advisories/GHSA-rhf7-wvw3-vjvm
Vendor Advisory
Exploit
https://github.com/patrickhener/goshs/commit/0e715b94e10c3d1aa552276000f15f104dee2f32
Patch
https://github.com/patrickhener/goshs/releases/tag/v2.0.2
Product
Release Notes