goshs has an Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in goshs PUT Upload

published 2026-04-03 7 mo ago modified 2026-07-24 3 mo ago also GHSA-g8mv-vp7j-qp64 , GO-2026-5394 , EUVD-2026-19488

cvss: 9.8; version 3.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.7%; EPSS 0.7% chance of exploitation in 30 days, percentile 51%
public exploits: 0; none known

goshs is a SimpleHTTPServer written in Go. Prior to 2.0.0-beta.3, PUT upload in httpserver/updown.go has no path sanitization. This vulnerability is fixed in 2.0.0-beta.3.

Patch / fix

fixed in 2 distros 1

go github.com/patrickhener/goshs 1.1.5-0.20260401172448-237f3af891a9
goshs goshs 2.0.0

govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1
goshs openSUSE Tumbleweed 2.0.0-1.1

opensuse advisories openSUSE-SU-2026:21483-1 openSUSE-SU-2026:10542-1

CISA SSVC

Exploitation: Proof of concept is public
Automatable: yes
Technical impact: total
Assessed: 7 mo ago (2026-04-07)

Exploit prediction

0.65% chance of exploitation in the next 30 days, higher than 51% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/patrickhener/goshs/security/advisories/GHSA-g8mv-vp7j-qp64 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	3.0	9.8	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
GitHub	3.0	9.8	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem	package	affected	fixed in
go	github.com/patrickhener/goshs	<1.1.5-0.20260401172448-237f3af891a9	1.1.5-0.20260401172448-237f3af891a9

Affected products

patrickhener goshs

Classification

Weakness

CWE-22 Improper Limitation of a Pathname to a Restricted Directory

References

github.com /patrickhener/goshs/security/advisories/GHSA-g8mv-vp7j-qp64
web, exploit, mitigation, vendor-advisory, advisory
nvd.nist.gov /vuln/detail/CVE-2026-35392
advisory
github.com /patrickhener/goshs
package

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary