GHSA-9P7W-W5Q6-MXJ3

Vulnerability from github – Published: 2026-05-28 18:30 – Updated: 2026-07-02 18:01
VLAI
Summary
Calico Inserts Sensitive Information into Log File
Details

In Calico, the install-cni init container logs the rendered CNI configuration to standard output. When the configuration template uses the SERVICEACCOUNT_TOKEN placeholder (Canal/Flannel-Calico deployments), the installer substitutes the live Kubernetes ServiceAccount bearer token before logging, exposing the token to any authenticated user with pods/log permission in the namespace with calico-node. The token holds patch privileges on pods/status, enabling annotation-based attacks against cluster workloads. The default kubeconfig-based authentication path is not affected. This is a direct regression of TTA-2018-001.

Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
6.0 (Medium)
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:L/SI:L/SA:L
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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/projectcalico/calico"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.0.0"
            },
            {
              "fixed": "3.31.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/projectcalico/calico"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.11.0-cni-plugin.0.20260417001138-cd73bc2cea0f"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-41184"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-532"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-07-02T18:01:02Z",
    "nvd_published_at": "2026-05-28T17:16:22Z",
    "severity": "MODERATE"
  },
  "details": "In Calico, the install-cni init container logs the rendered CNI configuration to standard output. When the configuration template uses the __SERVICEACCOUNT_TOKEN__ placeholder (Canal/Flannel-Calico deployments), the installer substitutes the live Kubernetes ServiceAccount bearer token before logging, exposing the token to any authenticated user with pods/log permission in the namespace with calico-node. The token holds patch privileges on pods/status, enabling annotation-based attacks against cluster workloads. The default kubeconfig-based authentication path is not affected. This is a direct regression of TTA-2018-001.",
  "id": "GHSA-9p7w-w5q6-mxj3",
  "modified": "2026-07-02T18:01:02Z",
  "published": "2026-05-28T18:30:32Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-41184"
    },
    {
      "type": "WEB",
      "url": "https://github.com/projectcalico/calico/pull/12502"
    },
    {
      "type": "WEB",
      "url": "https://github.com/projectcalico/calico/pull/12526"
    },
    {
      "type": "WEB",
      "url": "https://github.com/projectcalico/calico/pull/12527"
    },
    {
      "type": "WEB",
      "url": "https://github.com/projectcalico/calico/commit/0ca653db0ae7400ea9fb066daa7f45c902482271"
    },
    {
      "type": "WEB",
      "url": "https://github.com/projectcalico/calico/commit/cd73bc2cea0f4989772f2deb93909e7cfac927e0"
    },
    {
      "type": "WEB",
      "url": "https://github.com/projectcalico/calico/commit/da9ea3a13927a35e4022b787d17a005b2157d812"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/projectcalico/calico"
    },
    {
      "type": "WEB",
      "url": "https://www.tigera.io/security-bulletins/tta-2026-001"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:L/SI:L/SA:L",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Calico Inserts Sensitive Information into Log File"
}



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