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Vulnerability record · CVE-2026-78122 · published 22 August 2026

CVE-2026-78122: docker-socket-proxy fails to properly gate read endpoints in the /containers Docker API namespace when the CON…

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.

8.3 CVSS 4.0 High EPSS 0.31% · top 78.7% CWE-1220 · CWE-1220 Deferred
8.3CVSS 4.0 base score
0.31%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
7References
24 Sep 2026Last modified by NVD

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.

CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
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-contain
https://github.com/Tecnativa/docker-socket-proxy/issues/182

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Source: NIST National Vulnerability Database (record CVE-2026-78122), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.