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Medium

Open WebUI - Server-Side Request Forgery via Location Redirect in /api/v1/retrieval/process/web

Type: advisorySources: OSV

Open WebUI before 0.6.27 contains a server-side request forgery vulnerability in the /api/v1/retrieval/process/web endpoint that allows authenticated users to bypass SSRF protections. Attackers can manipulate URL parameters with location redirect headers to access internal services and potentially execute commands via instance secrets.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2026-56399
Confirmed fixed CVEs
Not specified
Updated in this feed
3 Nov 2026, 04:28 UTC · Revision 1

Source evidence

Open WebUI - Server-Side Request Forgery via Location Redirect in /api/v1/retrieval/process/web

core-osv · Original source

Published 30 Jun 2026, 22:08 UTC

Open WebUI before 0.6.27 contains a server-side request forgery vulnerability in the /api/v1/retrieval/process/web endpoint that allows authenticated users to bypass SSRF protections. Attackers can manipulate URL parameters with location redirect headers to access internal services and potentially execute commands via instance secrets.

osv:CVE-2026-56399
Complete source record
{
  "id": "a49e45b2025f9725ad9e538af1b68dcb53b18f208f0eb9339f851e6085eded56",
  "url": "https://osv.dev/vulnerability/CVE-2026-56399",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Open WebUI - Server-Side Request Forgery via Location Redirect in /api/v1/retrieval/process/web",
    "summary": "Open WebUI before 0.6.27 contains a server-side request forgery vulnerability in the /api/v1/retrieval/process/web endpoint that allows authenticated users to bypass SSRF protections. Attackers can manipulate URL parameters with location redirect headers to access internal services and potentially execute commands via instance secrets.",
    "evidence": "osv:CVE-2026-56399",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-56399",
      "aliases": [
        "CVE-2026-56399",
        "GHSA-82r6-c5jm-f3mw"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/open-webui/open-webui",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "918f507d8cdc652ae913b8596877a8a50b845114"
                },
                {
                  "fixed": "02238d3113e966c353fce18f1b65117380896774"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.6.27"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "fixed": "02238d3113e966c353fce18f1b65117380896774"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.6.26",
            "v0.6.25",
            "v0.6.24",
            "v0.6.23",
            "v0.6.22",
            "v0.6.21",
            "v0.6.20",
            "v0.6.19",
            "v0.6.18",
            "v0.6.17",
            "v0.6.16",
            "v0.6.15",
            "v0.6.14",
            "v0.6.13",
            "v0.6.12",
            "v0.6.11",
            "v0.6.10",
            "v0.6.9",
            "v0.6.8",
            "v0.6.7",
            "v0.6.6",
            "v0.6.5",
            "v0.6.4",
            "v0.6.3",
            "v0.6.2",
            "v0.6.1",
            "v0.6.0",
            "v0.5.16",
            "v0.5.20",
            "v0.5.19",
            "v0.5.18",
            "v0.5.17",
            "v0.5.15",
            "v0.5.14",
            "v0.5.12",
            "v0.5.13",
            "v0.5.11",
            "v0.5.10",
            "v0.5.9",
            "v0.5.8",
            "v0.5.7",
            "v0.5.6",
            "v0.5.5",
            "v0.5.4",
            "v0.5.3",
            "v0.5.2",
            "v0.5.1",
            "v0.5.0",
            "v0.4.8",
            "v0.4.7",
            "v0.4.6",
            "v0.4.5",
            "v0.4.4",
            "v0.4.3",
            "v0.4.2",
            "v0.4.1",
            "v0.4.0",
            "v0.3.35",
            "v0.3.34",
            "v0.3.33",
            "v0.3.32",
            "v0.3.31",
            "v0.3.30",
            "v0.3.29",
            "v0.3.28",
            "v0.3.27",
            "v0.3.26",
            "v0.3.25",
            "v0.3.24",
            "v0.3.23",
            "v0.3.22",
            "v0.3.21",
            "v0.3.20",
            "v0.3.19",
            "v0.3.18",
            "v0.3.17",
            "v0.3.16",
            "v0.3.15",
            "v0.3.14",
            "v0.3.13",
            "v0.3.12",
            "v0.3.11",
            "v0.3.10",
            "v0.3.9",
            "v0.3.8",
            "v0.3.7",
            "v0.3.6",
            "v0.3.5",
            "v0.3.4",
            "v0.3.3",
            "v0.3.2",
            "v0.3.1",
            "v0.3.0",
            "v0.2.5",
            "v0.2.4",
            "v0.2.3",
            "v0.2.2",
            "v0.2.1",
            "v0.2.0",
            "v0.1.125",
            "v0.1.124",
            "v0.1.123",
            "v0.1.122",
            "v0.1.114",
            "v0.1.121",
            "v0.1.120",
            "v0.1.119",
            "v0.1.118",
            "v0.1.117",
            "v0.1.116",
            "v0.1.115",
            "v0.1.108",
            "v0.1.113",
            "v0.1.112",
            "v0.1.111",
            "v0.1.110",
            "v0.1.109",
            "v0.1.107",
            "v0.1.106",
            "v0.1.105",
            "v0.1.104",
            "v0.1.103",
            "v0.1.102"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-56399.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:25.888715240Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56399.json",
        "https://github.com/open-webui/open-webui/security/advisories/GHSA-82r6-c5jm-f3mw",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-56399",
        "https://www.vulncheck.com/advisories/open-webui-server-side-request-forgery-via-location-redirect-in-api-v1-retrieval-process-web",
        "https://github.com/open-webui/open-webui/commit/02238d3113e966c353fce18f1b65117380896774"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-918"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56399.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-56399",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 492459,
  "published_at": "2026-06-30T22:08:40.248+00:00"
}