docker-socket-proxy through 0.5.0 Insufficient Access Control Granularity Exposes Container Filesystems

{
  "id": "f0c711270b55fe8479da08e25d5dbcd3e2f5f290324ce242424922736db54ae4",
  "url": "https://osv.dev/vulnerability/CVE-2026-78122",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "docker-socket-proxy through 0.5.0 Insufficient Access Control Granularity Exposes Container Filesystems",
    "summary": "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.",
    "evidence": "osv:CVE-2026-78122",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-78122",
      "aliases": [
        "CVE-2026-78122"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "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"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/tecnativa/docker-socket-proxy",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "2e118a0c0c66e1831f68b7afd6d49ad3e2f96b5d"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "0.5.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.5.0",
            "v0.4.2",
            "v0.4.1",
            "v0.4.0",
            "v0.3.0",
            "v0.2.0",
            "v0.1.2",
            "v0.1.1",
            "v0.1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-78122.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:39.220807506Z",
      "provider": "osv",
      "references": [
        "https://hub.docker.com/r/tecnativa/docker-socket-proxy",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/78xxx/CVE-2026-78122.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-78122",
        "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",
        "https://github.com/Tecnativa/docker-socket-proxy/pull/183",
        "https://github.com/Tecnativa/docker-socket-proxy",
        "https://github.com/Tecnativa/docker-socket-proxy/blob/v0.5.0/haproxy.cfg#L49-L61",
        "https://gist.github.com/nedlir/e4f52f88a757f02c67db1fd5dd70d732"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-1220"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/78xxx/CVE-2026-78122.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-78122",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 506689,
  "published_at": "2026-08-22T23:06:32.896+00:00"
}