WeKnora before 0.8.2 SSRF Guard Bypass via NAT64 IPv6 Addresses

{
  "id": "adfe487eba58d0d1231e32c5467a646381ecdd90bbcc753a467694d72f76a44d",
  "url": "https://www.cve.org/CVERecord?id=CVE-2026-118376",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "WeKnora before 0.8.2 SSRF Guard Bypass via NAT64 IPv6 Addresses",
    "summary": "WeKnora before 0.8.2 contains a server-side request forgery vulnerability in isRestrictedIP() that misclassifies NAT64-prefixed IPv6 addresses as public. Authenticated attackers can supply URLs resolving to NAT64 encodings of internal addresses via web_fetch or URL-based knowledge import to reach internal services or cloud metadata endpoints.",
    "evidence": "cve:CVE-2026-118376",
    "products": [
      {
        "name": {
          "value": "WeKnora",
          "evidence": "/containers/cna/affected/0/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-118376",
      "aliases": [
        "CVE-2026-118376"
      ],
      "metrics": [
        {
          "format": "CVSS",
          "cvssV4_0": {
            "version": "4.0",
            "baseScore": 6,
            "attackVector": "NETWORK",
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N",
            "userInteraction": "NONE",
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "privilegesRequired": "LOW",
            "subIntegrityImpact": "NONE",
            "vulnIntegrityImpact": "NONE",
            "subAvailabilityImpact": "NONE",
            "vulnAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "vulnConfidentialityImpact": "HIGH"
          }
        },
        {
          "format": "CVSS",
          "cvssV3_1": {
            "scope": "UNCHANGED",
            "version": "3.1",
            "baseScore": 5.3,
            "attackVector": "NETWORK",
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N",
            "integrityImpact": "NONE",
            "userInteraction": "NONE",
            "attackComplexity": "HIGH",
            "availabilityImpact": "NONE",
            "privilegesRequired": "LOW",
            "confidentialityImpact": "HIGH"
          }
        }
      ],
      "affected": [
        {
          "repo": "https://github.com/Tencent/WeKnora",
          "vendor": "Tencent",
          "product": "WeKnora",
          "versions": [
            {
              "status": "affected",
              "version": "0.2.11",
              "lessThan": "0.8.2",
              "versionType": "semver"
            }
          ],
          "packageURL": "pkg:golang/github.com/Tencent/WeKnora",
          "defaultStatus": "unaffected"
        }
      ],
      "modified": "2026-10-28T16:11:20.194Z",
      "provider": "cve",
      "references": [
        "https://github.com/Tencent/WeKnora/issues/4092",
        "https://github.com/Tencent/WeKnora/commit/ff818b681f10bc29edbc48fe35f00009dc276bfa",
        "https://github.com/Tencent/WeKnora/commit/d7ccd5ba517cc3968e6d5000a2ab0f4b51ef1dda",
        "https://github.com/Tencent/WeKnora/blob/3d5d8bfcdfeeea266b292b71cea616847af28d0f/internal/utils/security.go#L267-L327",
        "https://github.com/Tencent/WeKnora/releases/tag/v0.8.2",
        "https://github.com/Tencent/WeKnora",
        "https://www.vulncheck.com/advisories/weknora-before-0.8.2-ssrf-guard-bypass-via-nat64-ipv6-addresses"
      ],
      "provider_metadata": {
        "adp": [
          {
            "title": "CISA ADP Vulnrichment",
            "metrics": [
              {
                "other": {
                  "type": "ssvc",
                  "content": {
                    "id": "CVE-2026-118376",
                    "role": "CISA Coordinator",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "version": "2.0.3",
                    "timestamp": "2026-10-28T14:35:39.639974Z"
                  }
                }
              }
            ],
            "providerMetadata": {
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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              "dateUpdated": "2026-10-28T16:11:20.194Z"
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        "cna": {
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          "shortName": "VulnCheck",
          "dateUpdated": "2026-10-28T02:03:23.589Z"
        }
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    },
    "related_cves": [
      {
        "value": "CVE-2026-118376",
        "evidence": "/cveMetadata/cveId"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/containers/cna/metrics"
  },
  "source_id": "core-cve",
  "document_id": 460255,
  "published_at": "2026-10-28T02:03:23.589+00:00"
}