Insufficient Access Control in Docker-Socket-Proxy Exposes Container Filesystems
CVE-2026-78122

8.3HIGH

Key Information:

Vendor

Tecnativa

Status
Docker-socket-proxy
Vendor
CVE Published:
22 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-78122?

The docker-socket-proxy has a security flaw that allows unauthorized access to sensitive information through the Docker API. When the CONTAINERS environment variable is set, attackers can exploit this weakness to perform GET requests on specific API endpoints, such as /containers/{id}/logs and /containers/{id}/archive. This exposure enables them to read arbitrary files and retrieve entire container filesystems as tar archives, potentially compromising sensitive data and application integrity. Users are advised to apply the necessary patches and review access controls to mitigate these risks.

Affected Version(s)

docker-socket-proxy 0 <= 0.5.0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-78122 - Proof of Concept

References

https://github.com/Tecnativa/docker-socket-proxy/issues/182
issue-tracking
https://github.com/Tecnativa/docker-socket-proxy
product
https://github.com/Tecnativa/docker-socket-proxy/blob/v0....
technical-description

CVSS V4

Score:
8.3
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
None
Attack Vector:
Adjacent Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

nedlir
.