goshs: WebDAV listener ignores --read-only, --upload-only, and --no-delete mode flags (CVE-2026-50138) | HOL Guard CVE

High · CVSS 8.1CVE-2026-50138GHSA-3WHC-QVHV-XQJP

goshs: WebDAV listener ignores --read-only, --upload-only, and --no-delete mode flags

Answer in brief

CVE-2026-50138 records a High severity (CVSS 8.1) vulnerability in goshs: WebDAV listener ignores --read-only, --upload-only, and --no-delete mode flags. The current sources do not mark it as known exploited. The current feed maps patrickhener/goshs (generic), goshs.de/goshs/v2 (go). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 18, 2026Updated Aug 19, 2026Source checked Sep 17, 2026First seen by HOL Jul 1, 2026Material review Aug 19, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 8.1
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 8.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps patrickhener/goshs (generic), goshs.de/goshs/v2 (go). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
patrickhener/goshsgeneric	< 2.1.0	Not reported
goshs.de/goshs/v2go	<=2.0.9	2.1.0

Recommended response

Check inventory. Check lockfiles and deployed manifests for patrickhener/goshs, goshs.de/goshs/v2.
Review the reported fix. Update goshs.de/goshs/v2 to 2.1.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 18, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 19, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Jul 1, 2026

Sources and claim methodology

Upstream source description

goshs is a SimpleHTTPServer written in Go. Prior to version 2.1.0, when `goshs` is launched with WebDAV enabled (`-w`), the mode-restriction flags `--read-only`, `--upload-only`, and `--no-delete` are enforced only on the primary HTTP port. The WebDAV port is wired straight to `golang.org/x/net/webdav.Handler` with no equivalent guard, so an authenticated WebDAV client can `PUT`, `DELETE`, `MKCOL`, `MOVE`, and `COPY` despite the operator's stated intent. Version 2.1.0 patches the issue.

Quoted source text, attributed separately from HOL analysis.