CVE-2026-42091

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.

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Produits concernés

• patrickhener goshs
• Goshs goshs

Scores CVSS

Faiblesses (CWE)

• CWE-352

Références

• https://github.com/patrickhener/goshs/commit/0e715b94e10c3d1aa552276000f15f104dee2f32 Patch
• https://github.com/patrickhener/goshs/releases/tag/v2.0.2 ProductRelease Notes
• https://github.com/patrickhener/goshs/security/advisories/GHSA-rhf7-wvw3-vjvm ExploitVendor Advisory
• https://github.com/patrickhener/goshs/security/advisories/GHSA-rhf7-wvw3-vjvm ExploitVendor Advisory

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories