Information disclosure in Goshs
CVE-2026-40885
goshs is a SimpleHTTPServer written in Go. From 2.0.0-beta.4 to 2.0.0-beta.5, goshs leaks file-based ACL credentials through its public collaborator feed when the server is deployed without global basic auth. Requests to .goshs-protected folders are logged before authorization is enforced, and the collaborator websocket broadcasts raw request headers, including Authorization. An unauthenticated observer can capture a victim's folder-specific basic-auth header and replay it to read, upload, overwrite, and delete files inside the protected subtree. This vulnerability is fixed in 2.0.0-beta.6.
Vulnerability class: Information Disclosure
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.005 (36.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 36.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.005 · change: +0.001
Affected products
- Goshs — versions 2.0.0
- Patrickhener Goshs — versions >= 2.0.0-beta.4, < 2.0.0-beta.6
Weakness classification (CWE)
References
- github.com/patrickhener/goshs/security/advisories/GHSA-7h3j-592v-jcrp (Exploit, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-40885?
- CVE-2026-40885 is a high-severity vulnerability in Goshs, classified under Information Disclosure. CVSS score: 8.8/10. Published 2026-04-21.
- How severe is CVE-2026-40885?
- High severity. CVSS v3 base score is 8.8 out of 10.