CVE-2026-41184 (GCVE-0-2026-41184)

Vulnerability from cvelistv5 – Published: 2026-05-28 15:47 – Updated: 2026-05-28 17:04
VLAI
Title
ServiceAccount token disclosure via install-cni container logs
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.
Severity
6 (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
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-532 - Insertion of sensitive information into log file
Assigner
References
Impacted products
Vendor Product Version
Tigera Calico Unaffected: 3.32.0 (semver)
Affected: 0 , < 3.31.6 (semver)
Create a notification for this product.
Date Public
2026-05-28 16:00
Credits
Behnam Shobiri Behnam Shobiri Anthony Tam Matt Dupre Casey Davenport
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-41184",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-28T17:04:29.437633Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-28T17:04:36.059Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "affected",
          "packageName": "cni-plugin",
          "product": "Calico",
          "vendor": "Tigera",
          "versions": [
            {
              "status": "unaffected",
              "version": "3.32.0",
              "versionType": "semver"
            },
            {
              "lessThan": "3.31.6",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:tigera:calico:3.32.0:*:*:*:*:*:*:*",
                  "vulnerable": false
                },
                {
                  "criteria": "cpe:2.3:a:tigera:calico:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "3.31.6",
                  "versionStartIncluding": "0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ],
          "operator": "OR"
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Behnam Shobiri"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "Behnam Shobiri"
        },
        {
          "lang": "en",
          "type": "remediation reviewer",
          "value": "Anthony Tam"
        },
        {
          "lang": "en",
          "type": "remediation reviewer",
          "value": "Matt Dupre"
        },
        {
          "lang": "en",
          "type": "remediation verifier",
          "value": "Casey Davenport"
        }
      ],
      "datePublic": "2026-05-28T16:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cspan\u003eIn Calico, the install-cni init container logs the rendered CNI configuration to standard output. When the configuration template uses the \u003c/span\u003e\u003cspan\u003e__SERVICEACCOUNT_TOKEN__\u003c/span\u003e\u003cspan\u003e placeholder (Canal/Flannel-Calico deployments), the installer substitutes the live Kubernetes ServiceAccount bearer token before logging, exposing the token to any authenticated user with \u003c/span\u003e\u003cspan\u003epods/log\u003c/span\u003e\u003cspan\u003e permission in the namespace with calico-node. The token holds \u003c/span\u003e\u003cspan\u003epatch\u003c/span\u003e\u003cspan\u003e 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.\u003c/span\u003e"
            }
          ],
          "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."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-150",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-150 Collect Data from Common Resource Locations"
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 6,
            "baseSeverity": "MEDIUM",
            "exploitMaturity": "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",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "NONE",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-532",
              "description": "CWE-532 Insertion of sensitive information into log file",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-28T15:47:42.173Z",
        "orgId": "e6d453f4-3dae-4941-bcea-9af25f4e824d",
        "shortName": "Tigera"
      },
      "references": [
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/projectcalico/calico/pull/12502"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/projectcalico/calico/pull/12527"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/projectcalico/calico/pull/12526"
        },
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://www.tigera.io/security-bulletins/tta-2026-001/"
        }
      ],
      "source": {
        "discovery": "INTERNAL"
      },
      "title": "ServiceAccount token disclosure via install-cni container logs",
      "x_generator": {
        "engine": "Vulnogram 1.0.2"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "e6d453f4-3dae-4941-bcea-9af25f4e824d",
    "assignerShortName": "Tigera",
    "cveId": "CVE-2026-41184",
    "datePublished": "2026-05-28T15:47:42.173Z",
    "dateReserved": "2026-04-17T17:41:35.905Z",
    "dateUpdated": "2026-05-28T17:04:36.059Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-41184",
      "date": "2026-06-02",
      "epss": "0.00079",
      "percentile": "0.23472"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-41184\",\"sourceIdentifier\":\"psirt@tigera.io\",\"published\":\"2026-05-28T17:16:22.270\",\"lastModified\":\"2026-05-28T18:55:06.837\",\"vulnStatus\":\"Undergoing Analysis\",\"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.\"}],\"metrics\":{\"cvssMetricV40\":[{\"source\":\"psirt@tigera.io\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"4.0\",\"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\",\"baseScore\":6.0,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"attackRequirements\":\"PRESENT\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"vulnConfidentialityImpact\":\"HIGH\",\"vulnIntegrityImpact\":\"NONE\",\"vulnAvailabilityImpact\":\"NONE\",\"subConfidentialityImpact\":\"LOW\",\"subIntegrityImpact\":\"LOW\",\"subAvailabilityImpact\":\"LOW\",\"exploitMaturity\":\"NOT_DEFINED\",\"confidentialityRequirement\":\"NOT_DEFINED\",\"integrityRequirement\":\"NOT_DEFINED\",\"availabilityRequirement\":\"NOT_DEFINED\",\"modifiedAttackVector\":\"NOT_DEFINED\",\"modifiedAttackComplexity\":\"NOT_DEFINED\",\"modifiedAttackRequirements\":\"NOT_DEFINED\",\"modifiedPrivilegesRequired\":\"NOT_DEFINED\",\"modifiedUserInteraction\":\"NOT_DEFINED\",\"modifiedVulnConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedVulnIntegrityImpact\":\"NOT_DEFINED\",\"modifiedVulnAvailabilityImpact\":\"NOT_DEFINED\",\"modifiedSubConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedSubIntegrityImpact\":\"NOT_DEFINED\",\"modifiedSubAvailabilityImpact\":\"NOT_DEFINED\",\"Safety\":\"NOT_DEFINED\",\"Automatable\":\"NOT_DEFINED\",\"Recovery\":\"NOT_DEFINED\",\"valueDensity\":\"NOT_DEFINED\",\"vulnerabilityResponseEffort\":\"NOT_DEFINED\",\"providerUrgency\":\"NOT_DEFINED\"}}]},\"weaknesses\":[{\"source\":\"psirt@tigera.io\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-532\"}]}],\"references\":[{\"url\":\"https://github.com/projectcalico/calico/pull/12502\",\"source\":\"psirt@tigera.io\"},{\"url\":\"https://github.com/projectcalico/calico/pull/12526\",\"source\":\"psirt@tigera.io\"},{\"url\":\"https://github.com/projectcalico/calico/pull/12527\",\"source\":\"psirt@tigera.io\"},{\"url\":\"https://www.tigera.io/security-bulletins/tta-2026-001/\",\"source\":\"psirt@tigera.io\"}]}}",
    "vulnrichment": {
      "containers": "{\"cna\": {\"providerMetadata\": {\"orgId\": \"e6d453f4-3dae-4941-bcea-9af25f4e824d\", \"shortName\": \"Tigera\", \"dateUpdated\": \"2026-05-28T15:47:42.173Z\"}, \"title\": \"ServiceAccount token disclosure via install-cni container logs\", \"datePublic\": \"2026-05-28T16:00:00.000Z\", \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"cweId\": \"CWE-532\", \"description\": \"CWE-532 Insertion of sensitive information into log file\", \"type\": \"CWE\"}]}], \"impacts\": [{\"capecId\": \"CAPEC-150\", \"descriptions\": [{\"lang\": \"en\", \"value\": \"CAPEC-150 Collect Data from Common Resource Locations\"}]}], \"affected\": [{\"vendor\": \"Tigera\", \"product\": \"Calico\", \"packageName\": \"cni-plugin\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"3.32.0\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"3.31.6\", \"versionType\": \"semver\"}], \"defaultStatus\": \"affected\"}], \"cpeApplicability\": [{\"operator\": \"OR\", \"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": false, \"criteria\": \"cpe:2.3:a:tigera:calico:3.32.0:*:*:*:*:*:*:*\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:a:tigera:calico:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"0\", \"versionEndExcluding\": \"3.31.6\"}]}]}], \"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.\", \"supportingMedia\": [{\"type\": \"text/html\", \"base64\": false, \"value\": \"\u003cspan\u003eIn Calico, the install-cni init container logs the rendered CNI configuration to standard output. When the configuration template uses the \u003c/span\u003e\u003cspan\u003e__SERVICEACCOUNT_TOKEN__\u003c/span\u003e\u003cspan\u003e placeholder (Canal/Flannel-Calico deployments), the installer substitutes the live Kubernetes ServiceAccount bearer token before logging, exposing the token to any authenticated user with \u003c/span\u003e\u003cspan\u003epods/log\u003c/span\u003e\u003cspan\u003e permission in the namespace with calico-node. The token holds \u003c/span\u003e\u003cspan\u003epatch\u003c/span\u003e\u003cspan\u003e 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.\u003c/span\u003e\"}]}], \"references\": [{\"url\": \"https://github.com/projectcalico/calico/pull/12502\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/projectcalico/calico/pull/12527\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/projectcalico/calico/pull/12526\", \"tags\": [\"patch\"]}, {\"url\": \"https://www.tigera.io/security-bulletins/tta-2026-001/\", \"tags\": [\"vendor-advisory\"]}], \"metrics\": [{\"format\": \"CVSS\", \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}], \"cvssV4_0\": {\"attackVector\": \"NETWORK\", \"attackComplexity\": \"LOW\", \"attackRequirements\": \"PRESENT\", \"privilegesRequired\": \"LOW\", \"userInteraction\": \"NONE\", \"vulnConfidentialityImpact\": \"HIGH\", \"subConfidentialityImpact\": \"LOW\", \"vulnIntegrityImpact\": \"NONE\", \"subIntegrityImpact\": \"LOW\", \"vulnAvailabilityImpact\": \"NONE\", \"subAvailabilityImpact\": \"LOW\", \"exploitMaturity\": \"NOT_DEFINED\", \"Safety\": \"NOT_DEFINED\", \"Automatable\": \"NOT_DEFINED\", \"Recovery\": \"NOT_DEFINED\", \"valueDensity\": \"NOT_DEFINED\", \"vulnerabilityResponseEffort\": \"NOT_DEFINED\", \"providerUrgency\": \"NOT_DEFINED\", \"version\": \"4.0\", \"baseSeverity\": \"MEDIUM\", \"baseScore\": 6, \"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\"}}], \"credits\": [{\"lang\": \"en\", \"value\": \"Behnam Shobiri\", \"type\": \"finder\"}, {\"lang\": \"en\", \"value\": \"Behnam Shobiri\", \"type\": \"remediation developer\"}, {\"lang\": \"en\", \"value\": \"Anthony Tam\", \"type\": \"remediation reviewer\"}, {\"lang\": \"en\", \"value\": \"Matt Dupre\", \"type\": \"remediation reviewer\"}, {\"lang\": \"en\", \"value\": \"Casey Davenport\", \"type\": \"remediation verifier\"}], \"source\": {\"discovery\": \"INTERNAL\"}, \"x_generator\": {\"engine\": \"Vulnogram 1.0.2\"}}, \"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-41184\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-05-28T17:04:29.437633Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-05-28T17:04:33.558Z\"}}]}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-41184\", \"assignerOrgId\": \"e6d453f4-3dae-4941-bcea-9af25f4e824d\", \"state\": \"PUBLISHED\", \"assignerShortName\": \"Tigera\", \"dateReserved\": \"2026-04-17T17:41:35.905Z\", \"datePublished\": \"2026-05-28T15:47:42.173Z\", \"dateUpdated\": \"2026-05-28T17:04:36.059Z\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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.