FKIE_CVE-2026-41184

Vulnerability from fkie_nvd - Published: 2026-05-28 17:16 - Updated: 2026-06-05 17:05
Severity
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Summary
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.
References
psirt@tigera.iohttps://github.com/projectcalico/calico/pull/12502Issue Tracking, Patch
psirt@tigera.iohttps://github.com/projectcalico/calico/pull/12526Issue Tracking, Patch
psirt@tigera.iohttps://github.com/projectcalico/calico/pull/12527Issue Tracking, Patch
psirt@tigera.iohttps://www.tigera.io/security-bulletins/tta-2026-001/Mitigation, Vendor Advisory
Impacted products
Vendor Product Version
tigera calico *
tigera calico *
tigera calico *
tigera calico *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:tigera:calico:*:*:*:*:enterprise:*:*:*",
              "matchCriteriaId": "68BC4A3E-A53E-463F-B627-EB21276BE079",
              "versionEndExcluding": "3.21.7",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:tigera:calico:*:*:*:*:open_source:*:*:*",
              "matchCriteriaId": "878E68F9-0DAD-465A-875C-AAEC94EB3C72",
              "versionEndExcluding": "3.32.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:tigera:calico:*:*:*:*:cloud:*:*:*",
              "matchCriteriaId": "91B89C3B-F20D-403E-9207-39C084B6BCDB",
              "versionEndExcluding": "22.4.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:tigera:calico:*:*:*:*:enterprise:*:*:*",
              "matchCriteriaId": "A3C3C22D-0E75-48A1-A1C7-8DD4FE15BF1E",
              "versionEndExcluding": "3.22.3",
              "versionStartIncluding": "3.22.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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": "CVE-2026-41184",
  "lastModified": "2026-06-05T17:05:19.253",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "PRESENT",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 6.0,
          "baseSeverity": "MEDIUM",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "LOW",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "LOW",
          "subConfidentialityImpact": "LOW",
          "subIntegrityImpact": "LOW",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "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/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:X/V:X/RE:X/U:X",
          "version": "4.0",
          "vulnAvailabilityImpact": "NONE",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "NONE",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "psirt@tigera.io",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-05-28T17:16:22.270",
  "references": [
    {
      "source": "psirt@tigera.io",
      "tags": [
        "Issue Tracking",
        "Patch"
      ],
      "url": "https://github.com/projectcalico/calico/pull/12502"
    },
    {
      "source": "psirt@tigera.io",
      "tags": [
        "Issue Tracking",
        "Patch"
      ],
      "url": "https://github.com/projectcalico/calico/pull/12526"
    },
    {
      "source": "psirt@tigera.io",
      "tags": [
        "Issue Tracking",
        "Patch"
      ],
      "url": "https://github.com/projectcalico/calico/pull/12527"
    },
    {
      "source": "psirt@tigera.io",
      "tags": [
        "Mitigation",
        "Vendor Advisory"
      ],
      "url": "https://www.tigera.io/security-bulletins/tta-2026-001/"
    }
  ],
  "sourceIdentifier": "psirt@tigera.io",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-532"
        }
      ],
      "source": "psirt@tigera.io",
      "type": "Secondary"
    }
  ]
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.