CVE-2026-78122
docker-socket-proxy through 0.5.0 Insufficient Access Control Granularity Exposes Container Filesystems
- State
- Published
- Severity
- 8.3 High
- Published
- Aug 22, 2026
- Updated
- Sep 24, 2026
- Reserved
- Aug 22, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.3 High | 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 | VulnCheck |
| 3.1 | 7.4 High | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N | VulnCheck |
Weaknesses
- CWE-1220 Insufficient Granularity of Access Control
Affected Products
| Product | Versions |
|---|---|
docker-socket-proxyTecnativa |
|
References
- GitHub Issue #182issue-tracking
- https://github.com/Tecnativa/docker-socket-proxyproduct
- https://github.com/Tecnativa/docker-socket-proxy/blob/v0.5.0/haproxy.cfg#L49-L61technical-description
- https://github.com/Tecnativa/docker-socket-proxy/pull/183issue-trackingpatch
- https://gist.github.com/nedlir/e4f52f88a757f02c67db1fd5dd70d732exploit
- VulnCheck Advisory: docker-socket-proxy through 0.5.0 Insufficient Access Control Granularity Exposes Container Filesystemsthird-party-advisory
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