CVE-2026-50138Public exploitNetwork attack vector

Authenticated file access via unguarded WebDAV handler

Published Aug 18, 2026 · Updated Aug 19, 2026

Improper access control in the WebDAV listener in Patrick Hener goshs before 2.1.0 lets remote authenticated users read or modify files via WebDAV. In httpserver/server.go, the primary HTTP mux checks --read-only, --upload-only, and --no-delete on state-changing routes, but the separate WebDAV port passes requests directly to golang.org/x/net/webdav.Handler without equivalent verb-based guards. Exposure requires WebDAV to be enabled and reachable and, when Basic Auth is configured, valid credentials; under that setup, PUT, DELETE, MKCOL, MOVE, COPY, GET, and PROPFIND bypass the operator's intended mode restrictions.

CVSS severity8.1
High
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in the WebDAV listener in Patrick Hener goshs before 2.1.0 lets remote authenticated users read or modify files via WebDAV. In httpserver/server.go, the primary HTTP mux checks --read-only, --upload-only, and --no-delete on state-changing routes, but the separate WebDAV port passes requests directly to golang.org/x/net/webdav.Handler without equivalent verb-based guards. Exposure requires WebDAV to be enabled and reachable and, when Basic Auth is configured, valid credentials; under that setup, PUT, DELETE, MKCOL, MOVE, COPY, GET, and PROPFIND bypass the operator's intended mode restrictions.

The record

CVE
CVE-2026-50138
Published
Aug 18, 2026
Updated
Aug 19, 2026
Vendor
Patrick Hener
Product
goshs
Classifications
CWE-284
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 19, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Patrick Hener · goshsversion=< 2.1.0

Published CVSS scores

8.1GitHub_MCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-284Improper Access Control

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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