CVE-2026-78122Public exploitHinoki check available

Container filesystem disclosure via blanket namespace allow

Published Aug 22, 2026 · Updated Aug 22, 2026

Access-control bypass in Tecnativa docker-socket-proxy 0 through 0.5.0 allows remote attackers to read container filesystems via HTTP GET. The HAProxy rule for CONTAINERS prefix-matches the entire /containers namespace, forwarding archive, export, logs, and top requests without subpath-specific authorization. The proxy must be reachable with CONTAINERS=1 enabled; POST=0 does not block these reads, which expose files, logs, and process arguments.

CVSS severity8.3
High
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Access-control bypass in Tecnativa docker-socket-proxy 0 through 0.5.0 allows remote attackers to read container filesystems via HTTP GET. The HAProxy rule for CONTAINERS prefix-matches the entire /containers namespace, forwarding archive, export, logs, and top requests without subpath-specific authorization. The proxy must be reachable with CONTAINERS=1 enabled; POST=0 does not block these reads, which expose files, logs, and process arguments.

The record

CVE
CVE-2026-78122
Published
Aug 22, 2026
Updated
Aug 22, 2026
Vendor
Tecnativa
Product
docker-socket-proxy
Classifications
CWE-1220, T1005
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 22, 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 <=0.5.0

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Tecnativa · docker-socket-proxyversion=0 <=0.5.0

Published CVSS scores

7.4VulnCheckCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
8.3VulnCheckCVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-1220Insufficient Granularity of Access Control
T1005Data from Local System

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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