Auth bypass in Goshs-Labs Goshs
CVE-2026-66064
goshs is a feature-rich single-binary file server for red teamers and developers. Prior to 2.1.5, the httpserver/handler.go sendFile handler opened files using a cleaned path but derived the authorization filename from raw req.URL.Path, so a trailing slash could bypass .goshs ACL-file protection and block-list checks. This issue is fixed in version 2.1.5.
EPSS: 0.003 (23.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
Affected products
- Goshs-labs Goshs — versions < 2.1.5
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-66064?
- CVE-2026-66064 is a medium-severity vulnerability in Goshs-Labs Goshs, classified under CWE-41. CVSS score: 5.3/10. Published 2026-07-28.
- How severe is CVE-2026-66064?
- Medium severity. CVSS v3 base score is 5.3 out of 10.