What is CVE-2026-40189?

CVE-2026-40189 is a critical-severity vulnerability in Goshs, classified under Missing Authorization. CVSS score: 9.8/10. Published 2026-04-10.

How severe is CVE-2026-40189?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Auth bypass in Goshs

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 sta…

Vulnerability class: Broken Access Control

EPSS: 0.007 (47.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Goshs — versions 2.0.0
Patrickhener Goshs — versions < 2.0.0-beta.4

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Mitigation, Vendor Advisory)
security-advisories@github.com (Patch, x_refsource_MISC)
security-advisories@github.com (Product, x_refsource_MISC, Release Notes)

Frequently asked questions

What is CVE-2026-40189?: CVE-2026-40189 is a critical-severity vulnerability in Goshs, classified under Missing Authorization. CVSS score: 9.8/10. Published 2026-04-10.
How severe is CVE-2026-40189?: Critical severity. CVSS v3 base score is 9.8 out of 10.