CVE-2026-78122

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.

CVSS v3 7.4 HIGH

7.4^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 4.0

Attack Vector ADJACENT_NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://gist.github.com/nedlir/e4f52f88a757f02c67db1fd5dd70d732
https://github.com/Tecnativa/docker-socket-proxy
https://github.com/Tecnativa/docker-socket-proxy/blob/v0.5.0/haproxy.cfg#L49-L61
https://github.com/Tecnativa/docker-socket-proxy/issues/182
https://github.com/Tecnativa/docker-socket-proxy/pull/183
https://www.vulncheck.com/advisories/docker-socket-proxy-through-insufficient-access-control-granularity-exposes-container-filesystems
https://github.com/Tecnativa/docker-socket-proxy/issues/182

Configurations

No configuration.

History

12 Oct 2026, 16:10

Type	Values Removed	Values Added
Summary		(es) docker-socket-proxy falla al proteger adecuadamente los endpoints de lectura en el espacio de nombres de la API de Docker /containers cuando la variable de entorno CONTAINERS está configurada. Los atacantes pueden usar solicitudes GET a /containers/{id}/archive, /containers/{id}/export, /containers/{id}/logs y /containers/{id}/top para leer archivos arbitrarios y descargar sistemas de archivos de contenedores completos como archivos tar.

Information

Published : 2026-08-22 23:16

Updated : 2026-10-12 16:10

NVD link : CVE-2026-78122

Mitre link : CVE-2026-78122

CVE.ORG link : CVE-2026-78122

JSON object : View

Products Affected

No product.

CWE

CWE-1220

Insufficient Granularity of Access Control

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