CVE-2026-40883: goshs: CSRF in state-changing GET routes enables authenticated file deletion and directory creation

Severity: high (CVSS 8.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-04-21 · updated 2026-10-26
Weakness: CWE-352

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.

Affected products

patrickhener goshs: 2.0.0-beta4, 2.0.0-beta5

References

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

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