Host filesystem path disclosure via DNS rebinding

{
  "id": "32e989c784c131b5df907a09467f52b2d779a7a0acc649b14fec05ea3e2f58e7",
  "url": "https://www.cve.org/CVERecord?id=CVE-2026-109823",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Host filesystem path disclosure via DNS rebinding",
    "summary": "An attacker can read the name of filesystem paths of your application present via Tidewave configuration via /tidewave/connect or via the rendered toolbar. Neither response checks the Host header. A web page that rebinds its own domain to the loopback address can therefore read the tag with a same-origin request, which carries no Origin header. The paths usually reveal the local username and the project layout. This issue affects tidewave: from 0.8.0 before 0.9.2.",
    "evidence": "cve:CVE-2026-109823",
    "products": [
      {
        "name": {
          "value": "tidewave",
          "evidence": "/containers/cna/affected/0/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      },
      {
        "name": {
          "value": "tidewave",
          "evidence": "/containers/cna/affected/1/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "low",
    "structured": {
      "id": "CVE-2026-109823",
      "aliases": [
        "CVE-2026-109823"
      ],
      "metrics": [
        {
          "format": "CVSS",
          "cvssV4_0": {
            "Safety": "NOT_DEFINED",
            "version": "4.0",
            "Recovery": "NOT_DEFINED",
            "baseScore": 2.3,
            "Automatable": "NOT_DEFINED",
            "attackVector": "NETWORK",
            "baseSeverity": "LOW",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N",
            "providerUrgency": "NOT_DEFINED",
            "userInteraction": "PASSIVE",
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "privilegesRequired": "NONE",
            "subIntegrityImpact": "NONE",
            "vulnIntegrityImpact": "NONE",
            "subAvailabilityImpact": "NONE",
            "vulnAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "vulnConfidentialityImpact": "LOW",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "affected": [
        {
          "cpes": [
            "cpe:2.3:a:tidewave-ai:tidewave:*:*:*:*:*:*:*:*"
          ],
          "repo": "https://github.com/tidewave-ai/tidewave_phoenix",
          "vendor": "tidewave-ai",
          "modules": [
            "'Elixir.Tidewave'",
            "'Elixir.Tidewave.Router'"
          ],
          "product": "tidewave",
          "versions": [
            {
              "status": "affected",
              "version": "0.8.0",
              "lessThan": "0.9.2",
              "versionType": "semver"
            }
          ],
          "packageURL": "pkg:hex/tidewave",
          "packageName": "tidewave",
          "programFiles": [
            "lib/tidewave.ex",
            "lib/tidewave/router.ex"
          ],
          "collectionURL": "https://repo.hex.pm",
          "defaultStatus": "unaffected",
          "programRoutines": [
            {
              "name": "'Elixir.Tidewave':tidewave_config_meta/1"
            },
            {
              "name": "'Elixir.Tidewave':call/2"
            },
            {
              "name": "'Elixir.Tidewave.Router':call/2"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:a:tidewave-ai:tidewave:*:*:*:*:*:*:*:*"
          ],
          "repo": "https://github.com/tidewave-ai/tidewave_phoenix",
          "vendor": "tidewave-ai",
          "modules": [
            "'Elixir.Tidewave'",
            "'Elixir.Tidewave.Router'"
          ],
          "product": "tidewave",
          "versions": [
            {
              "status": "affected",
              "version": "f78352b56d19cd4ae49999aa385011cef73e8b93",
              "lessThan": "80159536f752dc4d34797934d1516f29cea12b50",
              "versionType": "git"
            }
          ],
          "packageURL": "pkg:github/tidewave-ai/tidewave_phoenix",
          "packageName": "tidewave-ai/tidewave_phoenix",
          "programFiles": [
            "lib/tidewave.ex",
            "lib/tidewave/router.ex"
          ],
          "collectionURL": "https://github.com",
          "defaultStatus": "unaffected",
          "programRoutines": [
            {
              "name": "'Elixir.Tidewave':tidewave_config_meta/1"
            },
            {
              "name": "'Elixir.Tidewave':call/2"
            },
            {
              "name": "'Elixir.Tidewave.Router':call/2"
            }
          ]
        }
      ],
      "modified": "2026-10-27T15:47:36.862Z",
      "provider": "cve",
      "references": [
        "https://cna.erlef.org/cves/CVE-2026-109823.html",
        "https://osv.dev/vulnerability/EEF-CVE-2026-109823",
        "https://github.com/tidewave-ai/tidewave_phoenix/commit/f78352b56d19cd4ae49999aa385011cef73e8b93",
        "https://github.com/tidewave-ai/tidewave_phoenix/commit/80159536f752dc4d34797934d1516f29cea12b50"
      ],
      "provider_metadata": {
        "cna": {
          "orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
          "shortName": "EEF",
          "dateUpdated": "2026-10-27T15:47:36.862Z"
        }
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-109823",
        "evidence": "/cveMetadata/cveId"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/containers/cna/metrics"
  },
  "source_id": "core-cve",
  "document_id": 394425,
  "published_at": "2026-10-27T15:47:36.862+00:00"
}