CVE-2026-26963 (GCVE-0-2026-26963)
Vulnerability from cvelistv5
Published
2026-02-19 23:38
Modified
2026-02-20 15:36
CWE
  • CWE-863 - Incorrect Authorization
Summary
Cilium is a networking, observability, and security solution with an eBPF-based dataplane. Versions 1.18.0 through 1.18.5 will incorrectly permit traffic from Pods on other nodes when Native Routing, WireGuard and Node Encryption are enabled. This issue has been fixed in version 1.18.6.
Impacted products
Vendor Product Version
cilium cilium Version: >= 1.18.0, < 1.18.6
Create a notification for this product.
Show details on NVD website


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        "metrics": [
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                "id": "CVE-2026-26963",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-02-20T15:26:45.815584Z",
                "version": "2.0.3"
              },
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        "providerMetadata": {
          "dateUpdated": "2026-02-20T15:36:37.658Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
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          "vendor": "cilium",
          "versions": [
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            }
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      ],
      "descriptions": [
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        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "ADJACENT_NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.1,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N",
            "version": "3.1"
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      "problemTypes": [
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              "cweId": "CWE-863",
              "description": "CWE-863: Incorrect Authorization",
              "lang": "en",
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          "tags": [
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          "tags": [
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      "source": {
        "advisory": "GHSA-5r23-prx4-mqg3",
        "discovery": "UNKNOWN"
      },
      "title": "Cilium may not enforce host firewall policies when Native Routing, WireGuard and Node Encryption are enabled"
    }
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    "datePublished": "2026-02-19T23:38:36.110Z",
    "dateReserved": "2026-02-16T22:20:28.612Z",
    "dateUpdated": "2026-02-20T15:36:37.658Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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