CVE-2026-34581Public exploitNetwork attack vector

Command execution via share-token authentication bypass

Published Apr 2, 2026 · Updated Apr 2, 2026

Authentication bypass in Patrick Hener goshs 1.1.0 through 2.0.0-beta.1 allows remote attackers with a share token to execute commands. BasicAuthMiddleware accepts tokens present in SharedLinks before checking credentials, then dispatches higher-priority handlers such as the WebSocket CLI. Exploitation requires a valid share token and user interaction to obtain it; with CLI mode enabled, the token grants command execution with the server process's privileges.

CVSS severity8.1
High
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Patrick Hener goshs 1.1.0 through 2.0.0-beta.1 allows remote attackers with a share token to execute commands. BasicAuthMiddleware accepts tokens present in SharedLinks before checking credentials, then dispatches higher-priority handlers such as the WebSocket CLI. Exploitation requires a valid share token and user interaction to obtain it; with CLI mode enabled, the token grants command execution with the server process's privileges.

The record

CVE
CVE-2026-34581
Published
Apr 2, 2026
Updated
Apr 2, 2026
Vendor
Patrick Hener
Product
goshs
Classifications
CWE-288, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 2, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 2, 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=>= 1.1.0, < 2.0.0-beta.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Patrick Hener · goshsversion=>= 1.1.0, < 2.0.0-beta.2

Published CVSS scores

8.1GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-288Authentication Bypass Using an Alternate Path or Channel
T1190Exploit Public-Facing Application

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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