CVE-2026-40189
goshs has a file-based ACL authorization bypass in goshs state-changing routes
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/patrickhener/goshs | <= 1.1.4 | none recorded |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Goshs | Goshs | before 2.0.0 Version 2.0.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/patrickhener/goshs/commit/f212c4f4a126556bab008f79758e21a839ef2c0f
- https://github.com/patrickhener/goshs/releases/tag/v2.0.0-beta.4
- https://github.com/patrickhener/goshs/security/advisories/GHSA-wvhv-qcqf-f3cx
- https://github.com/advisories/GHSA-wvhv-qcqf-f3cx
- https://nvd.nist.gov/vuln/detail/CVE-2026-40189