🛡️ CVE-2026-42091
🟡 CVSS 6.5 — Medium ✅ No Known Exploit CWE-352 NVD
6.5
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

Details

Severity Medium
CVSS Score 6.5
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
CWE CWE-352
Public Exploit ✅ No
Source NVD
Published 2026-04-23
Updated 2026-06-02
Modified 2026-05-05

Affected Packages

Software From version Fixed in
github.com/patrickhener/goshs — —
github.com/patrickhener/goshs/v2 — —
goshs — 2.0.2
unknown — —

Similar Threats

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