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CVE-2026-41520

Estado: AnalizadaMedia (4.4)—

Cilium is a networking, observability, and security solution with an eBPF-based dataplane. Prior to versions 1.17.15, 1.18.9, and 1.19.3, the output of cilium-bugtool can contain sensitive data when the tool is run against Cilium deployments with WireGuard encryption enabled. This issue has been patched in versions 1.17.15, 1.18.9, and 1.19.3.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Cilium — Cilium

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-41520",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-41520",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-05-13T19:26:17.922178Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 7.9,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "HIGH",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.8,
        "exploitabilityScore": 1.5
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 4.4,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "HIGH",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 0.8
      }
    ]
  },
  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "cilium",
          "product": "cilium",
          "versions": [
            {
              "status": "affected",
              "version": "< 1.17.15"
            },
            {
              "status": "affected",
              "version": ">= 1.18.0, < 1.18.9"
            },
            {
              "status": "affected",
              "version": ">= 1.19.0, < 1.19.3"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-05-08T23:16:35.597",
  "references": [
    {
      "url": "https://github.com/cilium/cilium/releases/tag/v1.17.15",
      "tags": [
        "Product",
        "Release Notes"
      ],
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/cilium/cilium/releases/tag/v1.18.9",
      "tags": [
        "Product",
        "Release Notes"
      ],
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/cilium/cilium/releases/tag/v1.19.3",
      "tags": [
        "Product",
        "Release Notes"
      ],
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/cilium/cilium/security/advisories/GHSA-gj49-89wh-h4gj",
      "tags": [
        "Mitigation",
        "Vendor Advisory"
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-200"
        },
        {
          "lang": "en",
          "value": "CWE-312"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-312"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Cilium is a networking, observability, and security solution with an eBPF-based dataplane. Prior to versions 1.17.15, 1.18.9, and 1.19.3, the output of cilium-bugtool can contain sensitive data when the tool is run against Cilium deployments with WireGuard encryption enabled. This issue has been patched in versions 1.17.15, 1.18.9, and 1.19.3."
    }
  ],
  "lastModified": "2026-06-17T10:46:49.900",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:cilium:cilium:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "0B5E0930-0B9D-4115-BFBA-963DEEBAD4DC",
              "versionEndExcluding": "1.17.15"
            },
            {
              "criteria": "cpe:2.3:a:cilium:cilium:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "DFA4C74D-FD76-492C-9515-F8CFF058E35D",
              "versionEndExcluding": "1.18.9",
              "versionStartIncluding": "1.18.0"
            },
            {
              "criteria": "cpe:2.3:a:cilium:cilium:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "7778BF24-30A2-4FB9-9D34-07687CFE40B8",
              "versionEndExcluding": "1.19.3",
              "versionStartIncluding": "1.19.0"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "security-advisories@github.com"
}