CVE-2026-94382Public exploitNetwork attack vectorHinoki check available

Telemetry disclosure via unchecked alert system IDs

Published Sep 21, 2026 · Updated Sep 21, 2026

Authorization bypass in henrygd Beszel before 0.19.0 allows remote authenticated users to create alerts for inaccessible systems. The POST and DELETE /api/beszel/user-alerts handlers accept attacker-supplied system IDs and save alert records without verifying system membership. Even readonly users can manipulate alerts tied to inaccessible systems; triggered notifications disclose system names and live metrics.

CVSS severity2.3
Low
EPSS probability0.30%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Authorization bypass in henrygd Beszel before 0.19.0 allows remote authenticated users to create alerts for inaccessible systems. The POST and DELETE /api/beszel/user-alerts handlers accept attacker-supplied system IDs and save alert records without verifying system membership. Even readonly users can manipulate alerts tied to inaccessible systems; triggered notifications disclose system names and live metrics.

The record

CVE
CVE-2026-94382
Published
Sep 21, 2026
Updated
Sep 21, 2026
Vendor
henrygd
Product
Beszel
Classifications
CWE-639
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 21, 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=0 <0.19.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

henrygd · Beszelversion=0 <0.19.0

Published CVSS scores

4.2GitHubCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
2.3VulnCheckCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA: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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key

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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