Description
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.
INFO
Published Date :
2026-05-04T17:24:47.890Z
Last Modified :
2026-05-05T14:14:46.121Z
Source :
GitHub_M
AFFECTED PRODUCTS
The following products are affected by CVE-2026-42091 vulnerability.
| Vendors | Products |
|---|---|
| Patrickhener |
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REFERENCES
Here, you will find a curated list of external links that provide in-depth information to CVE-2026-42091.
