WeKnora before 0.7.0 SSRF via Unvalidated HTTP Redirects

{
  "id": "1ac5d62bad322df2729abfd47fc79930add094b10ae8753674049ef7f50e0720",
  "url": "https://osv.dev/vulnerability/CVE-2026-91750",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "WeKnora before 0.7.0 SSRF via Unvalidated HTTP Redirects",
    "summary": "WeKnora before 0.7.0 fails to re-validate HTTP redirect targets in the POST /api/v1/knowledge-bases/:id/knowledge/url endpoint when downloading documents from user-supplied URLs. Authenticated attackers can bypass initial SSRF validation by supplying a public URL that redirects to internal network addresses, allowing access to internal services and cloud metadata.",
    "evidence": "osv:CVE-2026-91750",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-91750",
      "aliases": [
        "CVE-2026-91750"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/tencent/weknora",
              "type": "GIT",
              "events": [
                {
                  "introduced": "80bd2688623dda4b0e8df90ec911b97a8cee0a3a"
                },
                {
                  "fixed": "e8dcbb07d09db88894601b564ebabe21dda6830d"
                },
                {
                  "fixed": "1d322c525a6197d24f07555b4b18ad33313b4328"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0.5.2"
                      },
                      {
                        "fixed": "0.7.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "fixed": "1d322c525a6197d24f07555b4b18ad33313b4328"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.6.3",
            "v0.6.2",
            "v0.6.1",
            "v0.6.0",
            "v0.5.2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-91750.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:52.512115642Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/91xxx/CVE-2026-91750.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-91750",
        "https://www.vulncheck.com/advisories/weknora-before-0.7.0-ssrf-via-unvalidated-http-redirects",
        "https://github.com/Tencent/WeKnora/issues/2511",
        "https://github.com/Tencent/WeKnora/commit/1d322c525a6197d24f07555b4b18ad33313b4328",
        "https://github.com/Tencent/WeKnora",
        "https://github.com/Tencent/WeKnora/blob/v0.6.2/internal/application/service/knowledge_util.go#L339-L348"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-918"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/91xxx/CVE-2026-91750.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-91750",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 521301,
  "published_at": "2026-09-15T00:35:42.122+00:00"
}