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Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2026-42091

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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 3.9%
CVSS Severity
CVSS v3 Score 6.5
Products affected by CVE-2026-42091
  • Goshs » Goshs » Version: 0.0.1
    cpe:2.3:a:goshs:goshs:0.0.1
  • Goshs » Goshs » Version: 0.0.2
    cpe:2.3:a:goshs:goshs:0.0.2
  • Goshs » Goshs » Version: 0.0.3
    cpe:2.3:a:goshs:goshs:0.0.3
  • Goshs » Goshs » Version: 0.0.4
    cpe:2.3:a:goshs:goshs:0.0.4
  • Goshs » Goshs » Version: 0.0.5
    cpe:2.3:a:goshs:goshs:0.0.5
  • Goshs » Goshs » Version: 0.0.6
    cpe:2.3:a:goshs:goshs:0.0.6
  • Goshs » Goshs » Version: 0.0.8
    cpe:2.3:a:goshs:goshs:0.0.8
  • Goshs » Goshs » Version: 0.0.9
    cpe:2.3:a:goshs:goshs:0.0.9
  • Goshs » Goshs » Version: 0.1.0
    cpe:2.3:a:goshs:goshs:0.1.0
  • Goshs » Goshs » Version: 0.1.1
    cpe:2.3:a:goshs:goshs:0.1.1
  • Goshs » Goshs » Version: 0.1.2
    cpe:2.3:a:goshs:goshs:0.1.2
  • Goshs » Goshs » Version: 0.1.3
    cpe:2.3:a:goshs:goshs:0.1.3
  • Goshs » Goshs » Version: 0.1.4
    cpe:2.3:a:goshs:goshs:0.1.4
  • Goshs » Goshs » Version: 0.1.5
    cpe:2.3:a:goshs:goshs:0.1.5
  • Goshs » Goshs » Version: 0.1.6
    cpe:2.3:a:goshs:goshs:0.1.6
  • Goshs » Goshs » Version: 0.1.7
    cpe:2.3:a:goshs:goshs:0.1.7
  • Goshs » Goshs » Version: 0.1.8
    cpe:2.3:a:goshs:goshs:0.1.8
  • Goshs » Goshs » Version: 0.1.9
    cpe:2.3:a:goshs:goshs:0.1.9
  • Goshs » Goshs » Version: 0.2.0
    cpe:2.3:a:goshs:goshs:0.2.0
  • Goshs » Goshs » Version: 0.3.0
    cpe:2.3:a:goshs:goshs:0.3.0
  • Goshs » Goshs » Version: 0.3.1
    cpe:2.3:a:goshs:goshs:0.3.1
  • Goshs » Goshs » Version: 0.3.2
    cpe:2.3:a:goshs:goshs:0.3.2
  • Goshs » Goshs » Version: 0.3.3
    cpe:2.3:a:goshs:goshs:0.3.3
  • Goshs » Goshs » Version: 0.3.4
    cpe:2.3:a:goshs:goshs:0.3.4
  • Goshs » Goshs » Version: 0.3.5
    cpe:2.3:a:goshs:goshs:0.3.5
  • Goshs » Goshs » Version: 0.3.6
    cpe:2.3:a:goshs:goshs:0.3.6
  • Goshs » Goshs » Version: 0.3.7
    cpe:2.3:a:goshs:goshs:0.3.7
  • Goshs » Goshs » Version: 0.3.8
    cpe:2.3:a:goshs:goshs:0.3.8
  • Goshs » Goshs » Version: 0.3.9
    cpe:2.3:a:goshs:goshs:0.3.9
  • Goshs » Goshs » Version: 0.4.0
    cpe:2.3:a:goshs:goshs:0.4.0
  • Goshs » Goshs » Version: 0.4.1
    cpe:2.3:a:goshs:goshs:0.4.1
  • Goshs » Goshs » Version: 0.4.2
    cpe:2.3:a:goshs:goshs:0.4.2
  • Goshs » Goshs » Version: 1.0.0
    cpe:2.3:a:goshs:goshs:1.0.0
  • Goshs » Goshs » Version: 1.0.1
    cpe:2.3:a:goshs:goshs:1.0.1
  • Goshs » Goshs » Version: 1.0.2
    cpe:2.3:a:goshs:goshs:1.0.2
  • Goshs » Goshs » Version: 1.0.3
    cpe:2.3:a:goshs:goshs:1.0.3
  • Goshs » Goshs » Version: 1.0.4
    cpe:2.3:a:goshs:goshs:1.0.4
  • Goshs » Goshs » Version: 1.0.5
    cpe:2.3:a:goshs:goshs:1.0.5
  • Goshs » Goshs » Version: 1.0.6
    cpe:2.3:a:goshs:goshs:1.0.6
  • Goshs » Goshs » Version: 1.0.7
    cpe:2.3:a:goshs:goshs:1.0.7
  • Goshs » Goshs » Version: 1.0.8
    cpe:2.3:a:goshs:goshs:1.0.8
  • Goshs » Goshs » Version: 1.0.9
    cpe:2.3:a:goshs:goshs:1.0.9
  • Goshs » Goshs » Version: 1.1.0
    cpe:2.3:a:goshs:goshs:1.1.0
  • Goshs » Goshs » Version: 1.1.1
    cpe:2.3:a:goshs:goshs:1.1.1
  • Goshs » Goshs » Version: 1.1.2
    cpe:2.3:a:goshs:goshs:1.1.2
  • Goshs » Goshs » Version: 1.1.3
    cpe:2.3:a:goshs:goshs:1.1.3
  • Goshs » Goshs » Version: 1.1.4
    cpe:2.3:a:goshs:goshs:1.1.4
  • Goshs » Goshs » Version: 2.0.0
    cpe:2.3:a:goshs:goshs:2.0.0
  • Goshs » Goshs » Version: 2.0.1
    cpe:2.3:a:goshs:goshs:2.0.1


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