Vulnerability Description
goshs is a SimpleHTTPServer written in Go. Prior to 2.0.0-beta.4, goshs enforces the documented per-folder .goshs ACL/basic-auth mechanism for directory listings and file reads, but it does not enforce the same authorization checks for state-changing routes. An unauthenticated attacker can upload files with PUT, upload files with multipart POST /upload, create directories with ?mkdir, and delete files with ?delete inside a .goshs-protected directory. By deleting the .goshs file itself, the attacker can remove the folder's auth policy and then access previously protected content without credentials. This results in a critical authorization bypass affecting confidentiality, integrity, and availability. This vulnerability is fixed in 2.0.0-beta.4.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Goshs | Goshs | < 2.0.0 |
Related Weaknesses (CWE)
References
- https://github.com/patrickhener/goshs/commit/f212c4f4a126556bab008f79758e21a839ePatch
- https://github.com/patrickhener/goshs/releases/tag/v2.0.0-beta.4ProductRelease Notes
- https://github.com/patrickhener/goshs/security/advisories/GHSA-wvhv-qcqf-f3cxExploitMitigationVendor Advisory
- https://github.com/patrickhener/goshs/security/advisories/GHSA-wvhv-qcqf-f3cxExploitMitigationVendor Advisory
FAQ
What is CVE-2026-40189?
CVE-2026-40189 is a vulnerability with a CVSS score of 9.8 (CRITICAL). goshs is a SimpleHTTPServer written in Go. Prior to 2.0.0-beta.4, goshs enforces the documented per-folder .goshs ACL/basic-auth mechanism for directory listings and file reads, but it does not enforc...
How severe is CVE-2026-40189?
CVE-2026-40189 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-40189?
Check the references section above for vendor advisories and patch information. Affected products include: Goshs Goshs.