---
id: CVE-2026-78122
title: >-
  docker-socket-proxy fails to properly gate read endpoints in the /containers
  Docker API namespace when the CONTAINERS environment variable is set
summary: >-
  docker-socket-proxy fails to properly gate read endpoints in the /containers
  Docker API namespace when the CONTAINERS environment variable is set.
  Attackers can use GET requests to /containers/{id}/archive,
  /containers/{id}/export, /cont…
severity: high
cvss: 7.4
cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N'
cwe:
  - CWE-1220
vendor: Tecnativa
product: docker-socket-proxy
affected:
  - docker-socket-proxy <= 0.5.0
published: '2026-08-22'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T20:43:32.537'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-78122'
references:
  - url: 'https://gist.github.com/nedlir/e4f52f88a757f02c67db1fd5dd70d732'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/Tecnativa/docker-socket-proxy'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/Tecnativa/docker-socket-proxy/blob/v0.5.0/haproxy.cfg#L49-L61
    label: disclosure@vulncheck.com
  - url: 'https://github.com/Tecnativa/docker-socket-proxy/issues/182'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/Tecnativa/docker-socket-proxy/pull/183'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/docker-socket-proxy-through-insufficient-access-control-granularity-exposes-container-filesystems
    label: disclosure@vulncheck.com
  - url: 'https://github.com/Tecnativa/docker-socket-proxy/issues/182'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - exploit-available
  - cve.org
epss: 0.00309
epssPercentile: 0.21274
exploits:
  github: 1
  githubRepos:
    - 'https://github.com/Legendile7/CVE-2026-78122-POC'
  checkedAt: '2026-09-27T10:34:00.606Z'
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-08-26T17:55:36.477479Z'
ingestedAt: '2026-09-24T15:45:56.698Z'
---

## Overview

docker-socket-proxy fails to properly gate read endpoints in the /containers Docker API namespace when the CONTAINERS environment variable is set. Attackers can use GET requests to /containers/{id}/archive, /containers/{id}/export, /containers/{id}/logs, and /containers/{id}/top to read arbitrary files and download entire container filesystems as tar archives.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.