{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-59223",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-09T17:52:51.423655Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-09T17:53:06.003Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "open-webui",
          "vendor": "open-webui",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.10.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. Prior to 0.10.0, WEB_FETCH_FILTER_LIST matching compared configured host entries against URL strings and non-label-boundary suffixes, allowing path-based blocklist bypasses such as !internal.example.com in a URL path and sibling-domain matches that did not reflect the intended hostname policy. This issue is fixed in version 0.10.0."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-693",
              "description": "CWE-693: Protection Mechanism Failure",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-09T17:00:08.976Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/open-webui/open-webui/security/advisories/GHSA-qg3f-8x3j-ggf2",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/open-webui/open-webui/security/advisories/GHSA-qg3f-8x3j-ggf2"
        },
        {
          "name": "https://github.com/open-webui/open-webui/pull/25949",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/open-webui/open-webui/pull/25949"
        },
        {
          "name": "https://github.com/open-webui/open-webui/commit/087878ce848a4d828012068b5997dac480f43656",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/open-webui/open-webui/commit/087878ce848a4d828012068b5997dac480f43656"
        },
        {
          "name": "https://github.com/open-webui/open-webui/releases/tag/v0.10.0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/open-webui/open-webui/releases/tag/v0.10.0"
        }
      ],
      "source": {
        "advisory": "GHSA-qg3f-8x3j-ggf2",
        "discovery": "UNKNOWN"
      },
      "title": "Open WebUI: `WEB_FETCH_FILTER_LIST` host allow/block filter bypassable via URL path and non-label-boundary matching"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-59223",
    "datePublished": "2026-07-09T17:00:08.976Z",
    "dateReserved": "2026-07-02T21:05:02.925Z",
    "dateUpdated": "2026-07-09T17:53:06.003Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "open-webui"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.10.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-59223"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-693"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-07-24T20:49:40Z",
    "nvd_published_at": "2026-07-09T17:17:03Z",
    "severity": "MODERATE"
  },
  "details": "## Summary\n\nThe administrator-configured `WEB_FETCH_FILTER_LIST` (the allow/block list applied to server-side web fetches: RAG URL ingestion, URL-to-markdown, web-search content fetch) matches hostnames incorrectly, so the filter can be bypassed.\n\n## Details\n\n`is_string_allowed` (`backend/open_webui/utils/misc.py`) matches with `str.endswith(...)`, and the primary web-fetch call site (`backend/open_webui/retrieval/web/utils.py`) called it with the **full URL string**, not the hostname:\n\n- **Blocklist bypass via path.** A blocklist entry `!internal.example.com` only matches a URL that *ends with* that string. Any URL with a path (`https://internal.example.com/x`) ends with `/x`, so the entry never matches and the fetch proceeds. The blocklist effectively only stopped path-less URLs.\n- **Allowlist false-reject and bypass.** An allowlist `company.com` rejected the legitimate `https://api.company.com/status` and admitted `https://attacker.example/path/company.com`.\n- **Non-label-boundary matching** at the hostname-shaped call site (`retrieval/web/main.py`): `endswith(\u0027corp.com\u0027)` also matched `evilcorp.com`, and `10.0.0.1` matched `110.0.0.1`.\n\n## Impact\n\nAn authenticated user able to trigger a server-side web fetch can reach hosts the administrator intended to block with `WEB_FETCH_FILTER_LIST`.\n\nOpen WebUI\u0027s primary SSRF protection is a separate, always-on guard that rejects any URL resolving to a non-global IP (`validate_url` and the connection-layer `_ssrf_safe_new_conn`, active whenever `ENABLE_RAG_LOCAL_WEB_FETCH` is off, the default). That guard is unaffected by this issue and continues to block loopback, RFC1918 and link-local addresses, including the `169.254.169.254` cloud-metadata endpoint. This bypass therefore does **not** grant access to those internal targets. What it defeats is the administrator\u0027s ability to block specific **publicly-resolvable** hosts (internal services reachable from the server over a public IP, e.g. split-horizon DNS or internal PaaS endpoints) and to enforce an allowlist. Fetched content is returned to the requester, so for hosts reachable from the server\u0027s network position this is a read/content-disclosure SSRF against the admin-blocked host.\n\n## Patch\n\nMatching is now performed on the parsed hostname using DNS label boundaries. A dedicated `is_host_allowed(host, ...)` matches an entry only when host and entry are equal or the entry is a parent domain (`host == entry or host.endswith(\u0027.\u0027 + entry)`), so `corp.com` matches `api.corp.com` but not `evilcorp.com`, and IP entries match only the identical address. Both web-fetch call sites pass the parsed hostname rather than the full URL. The generic `is_string_allowed` is retained unchanged for unrelated non-host filters.\n\n## Credit\n\nReported by @addcontent.",
  "id": "GHSA-qg3f-8x3j-ggf2",
  "modified": "2026-07-24T20:49:40Z",
  "published": "2026-07-24T20:49:40Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/open-webui/open-webui/security/advisories/GHSA-qg3f-8x3j-ggf2"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-59223"
    },
    {
      "type": "WEB",
      "url": "https://github.com/open-webui/open-webui/pull/25949"
    },
    {
      "type": "WEB",
      "url": "https://github.com/open-webui/open-webui/commit/087878ce848a4d828012068b5997dac480f43656"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/open-webui/open-webui"
    },
    {
      "type": "WEB",
      "url": "https://github.com/open-webui/open-webui/releases/tag/v0.10.0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Open WebUI: `WEB_FETCH_FILTER_LIST` host allow/block filter bypassable via URL path and non-label-boundary matching"
}