CVE-2026-78122 (CVSS 7.4)

Description

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.

Is your site exposed to CVE-2026-78122?

Run a free security scan — no signup, results in seconds.

CVSS v3.1 Score

7.4

HIGH

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

EPSS — Exploit Prediction

0.0032

Probability of exploitation

0.25%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-1220 CWE-1220

References

Other References

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

Frequently Asked Questions

What is 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. It has a CVSS v3.1 base score of 7.4 (HIGH).

How severe is CVE-2026-78122? +

CVE-2026-78122 has a CVSS v3.1 score of 7.4 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0032, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-78122? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

CVE-2021-46747

Insufficient granularity of access control in ASP (AMD Secure Processor) may allow an attacker with an untrusted user space application …

CVE-2025-3648

A vulnerability has been identified in the Now Platform that could result in data being inferred without authorization. Under certain …

CVE-2024-21962

Improper Input Validation in the AMD RAID driver could allow an attacker to point to an arbitrary memory location potentially …

CVE-2026-86338

Ash field_policies are documented to protect against filter-based information disclosure: when a field the actor may not see is referenced …

CVE-2026-78230

AshAi exposes Ash read actions to language-model tool calls. The read tool accepts an aggregate result type (min, max, sum, …

CVE-2026-78216

AshLua exposes Ash read actions to Lua scripts run through an eval action. A read call accepts an operation (list, …

CVE-2026-78122