CVE-2026-42091 | BDVDB-2026-330356 Detail

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.

Impact#

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History#

1. Version 12026-05-04Record published in the CVE List.
2. Version 22026-05-05Most recent update recorded in the CVE List.