CVE-2026-27734Public exploitNetwork attack vector

Authenticated Docker API disclosure via path traversal

Published Feb 27, 2026 · Updated Feb 27, 2026

Path traversal in Beszel before 0.18.4 allows remote authenticated users to read Docker Engine API data from connected agent hosts. The hub's container info and logs endpoints forward the raw container query value, and the agent interpolates it into a Docker URL without path escaping, so ../ segments reach unintended endpoints. Any account, including a read-only role, can retrieve host, engine, container, image, network, storage, and security metadata when an agent exposes a Docker-compatible Unix socket.

CVSS severity6.5
Medium
EPSS probability0.48%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in Beszel before 0.18.4 allows remote authenticated users to read Docker Engine API data from connected agent hosts. The hub's container info and logs endpoints forward the raw container query value, and the agent interpolates it into a Docker URL without path escaping, so ../ segments reach unintended endpoints. Any account, including a read-only role, can retrieve host, engine, container, image, network, storage, and security metadata when an agent exposes a Docker-compatible Unix socket.

The record

CVE
CVE-2026-27734
Published
Feb 27, 2026
Updated
Feb 27, 2026
Vendor
henrygd
Product
Beszel
Classifications
CWE-22, T1613
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 27, 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=< 0.18.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

henrygd · Beszelversion=< 0.18.4

Published CVSS scores

6.5GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1613Container and Resource Discovery

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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