CVE-2026-40189
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 4.0
- 9.3
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N - CVSS 3.1
- 9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - EPSS
- 0.6% chance of exploitation in the next 30 days; higher than 50% of CVEs (scores of 2026-10-26)
- CWE
- CWE-862
- Published
- Modified
- Record from
- the NVD, synced
Affected
- goshs:goshs
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-wvhv-qcqf-f3cx | Go | github.com/patrickhener/goshs | <=1.1.4 | no fix published |
| GO-2026-5728 | Go | github.com/patrickhener/goshs | all versions | no fix published |
References
- 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/patrickhener/goshs/security/advisories/GHSA-wvhv-qcqf-f3cx