CVEvulnerability

CVE-2026-42091

6.5 MEDIUM Published 2026-05-04 Modified 2026-10-26 Official page ↗
Status
Analyzed
Published
2026-05-04
Last modified
2026-10-26
Assigner
[email protected]
CVSS 3.1 ([email protected])
6.5 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Weaknesses
CWE-352

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.

Affected configurations

• goshs goshs (< 2.0.2)

Related

Weakness · CWE (1)

  • CWE-352 Cross-Site Request Forgery weakness

References