Dashboard / CVE-2026-42091

CVE-2026-42091

MEDIUM
MEDIUM Priority: 0.01 BB Relevance: 63/100
Published: 2026-05-04 Modified: 2026-10-26 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity No Auth Integ. Impact

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: Required
S: Unchanged
C: None
I: High
A: None

Description

goshs is a SimpleHTTPServer written in Go. Prior to version 2.0.2, the PUT upload handler (httpserver/updown.go) lacks the CSRF token validation that was added to the POST upload handler during the CVE-2026-40883 fix. Combined with the unconditional Access-Control-Allow-Origin: * on the OPTIONS preflight handler (httpserver/server.go), any website can write arbitrary files to a goshs instance through the victim's browser — bypassing network isolation (e.g. localhost, internal network). This issue has been patched in version 2.0.2.

Weakness Classification (1)

Affected Software (1)

VendorProductVersion
goshs goshs < 2.0.2

References & Advisories (3)

Bug Bounty Relevance

63 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity

CVSS Score

6.5 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

EPSS — Exploitation Probability

0.17%
Raw Score 0.001650
Percentile 5.7%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00165
2026-10-28
0.00165

Intelligence Sources

nvd ref →

External Links