WeKnora: DNS Rebinding Vulnerability in web_fetch Tool Allows SSRF to Internal Resources

{
  "id": "e879a7c0ab781c734c002c8b86dee87ab0873ab94f2da503b927d9714ae243f3",
  "url": "https://osv.dev/vulnerability/CVE-2026-30858",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "WeKnora: DNS Rebinding Vulnerability in web_fetch Tool Allows SSRF to Internal Resources",
    "summary": "WeKnora is an LLM-powered framework designed for deep document understanding and semantic retrieval. Prior to version 0.3.0, a DNS rebinding vulnerability in the web_fetch tool allows an unauthenticated attacker to bypass URL validation and access internal resources on the server, including private IP addresses (e.g., 127.0.0.1, 192.168.x.x). By crafting a malicious domain that resolves to a public IP during validation and subsequently resolves to a private IP during execution, an attacker can access sensitive local services and potentially exfiltrate data. This issue has been patched in version 0.3.0.",
    "evidence": "osv:CVE-2026-30858",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-30858",
      "aliases": [
        "CVE-2026-30858",
        "GHSA-h6gw-8f77-mmmp",
        "GO-2026-4643"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/tencent/weknora",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2979f9764af4a6ae4e226be084a4fa91ed5c8249"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.3.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "cpe": "cpe:2.3:a:tencent:weknora:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.3.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.2.14",
            "v0.2.13",
            "v0.2.12",
            "v0.2.11",
            "v0.2.10",
            "v0.2.9",
            "v0.2.8",
            "v0.2.7",
            "v0.2.6",
            "v0.2.5",
            "v0.2.4",
            "v0.2.3",
            "v0.2.2",
            "v0.2.1",
            "v0.2.0",
            "v0.1.6",
            "v0.1.5",
            "v0.1.3",
            "v0.1.2",
            "v0.1.1",
            "v0.1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-30858.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:33.027211420Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/30xxx/CVE-2026-30858.json",
        "https://github.com/Tencent/WeKnora/security/advisories/GHSA-h6gw-8f77-mmmp",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-30858"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-918"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/30xxx/CVE-2026-30858.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-30858",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 499994,
  "published_at": "2026-03-07T16:34:28.528+00:00"
}