CVE-2026-40883

Description

goshs is a SimpleHTTPServer written in Go. From 2.0.0-beta.4 to 2.0.0-beta.5, goshs contains a cross-site request forgery issue in its state-changing HTTP GET routes. An external attacker can cause an already authenticated browser to trigger destructive actions such as ?delete and ?mkdir because goshs relies on HTTP basic auth alone and performs no CSRF, Origin, or Referer validation for those routes. This vulnerability is fixed in 2.0.0-beta.6.

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CVSS v3.1 Score

8.1

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H

EPSS — Exploit Prediction

0.0002

Probability of exploitation

0.04%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-352 Cross-Site Request Forgery

Affected Products

Vendor	Product	Versions
goshs	goshs	All
goshs	goshs	All

References

Advisories & Patches

https://github.com/patrickhener/goshs/security/advisories/GHSA-jrq5-hg6x-j6g3 https://github.com/patrickhener/goshs/security/advisories/GHSA-jrq5-hg6x-j6g3

Exploits

https://github.com/patrickhener/goshs/security/advisories/GHSA-jrq5-hg6x-j6g3 https://github.com/patrickhener/goshs/security/advisories/GHSA-jrq5-hg6x-j6g3

Frequently Asked Questions

What is CVE-2026-40883? +

goshs is a SimpleHTTPServer written in Go. From 2.0.0-beta.4 to 2.0.0-beta.5, goshs contains a cross-site request forgery issue in its state-changing HTTP GET routes. An external attacker can cause an already authenticated browser to trigger destructive actions such as ?delete and ?mkdir because goshs relies on HTTP basic auth alone and performs no CSRF, Origin, or Referer validation for those routes. This vulnerability is fixed in 2.0.0-beta.6. It has a CVSS v3.1 base score of 8.1 (HIGH).

How severe is CVE-2026-40883? +

CVE-2026-40883 has a CVSS v3.1 score of 8.1 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0002, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-40883? +

CVE-2026-40883 affects products from goshs, specifically: goshs. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-40883? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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