Open WebUI 0.6.27 before 0.11.4 Session Token Disclosure via OAuth-Mode Connections

{
  "id": "89dde270b409791371b444cb50ce7b044b8bb1e31a6205d0d4e78cb26ee51535",
  "url": "https://osv.dev/vulnerability/CVE-2026-109292",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Open WebUI 0.6.27 before 0.11.4 Session Token Disclosure via OAuth-Mode Connections",
    "summary": "Open WebUI from 0.6.27 before 0.11.4 contains an information disclosure vulnerability that allows destination servers to obtain user session cookies by receiving the full browser cookie jar on OAuth-mode connections. Operators of OpenAI-compatible connections, OpenAPI tool servers or terminal servers can capture forwarded session cookies from routine requests and replay them to hijack accounts, including administrators.",
    "evidence": "osv:CVE-2026-109292",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-109292",
      "aliases": [
        "CVE-2026-109292",
        "GHSA-gqfh-jxvw-74rp"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/open-webui/open-webui",
              "type": "GIT",
              "events": [
                {
                  "introduced": "918f507d8cdc652ae913b8596877a8a50b845114"
                },
                {
                  "fixed": "8bd8b4fac5e059578ac0c74b3c18d11139f88b7d"
                },
                {
                  "fixed": "f9f815c86220f809fad5ee1300c44f55dea74c79"
                },
                {
                  "fixed": "b71744b17823f7a3a9a64cb363e79a7164ed5b23"
                },
                {
                  "fixed": "3cda47cdb449aac970426f0929c9e5f8bb8bd807"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0.6.27"
                      },
                      {
                        "fixed": "0.11.4"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "fixed": "f9f815c86220f809fad5ee1300c44f55dea74c79"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "b71744b17823f7a3a9a64cb363e79a7164ed5b23"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "3cda47cdb449aac970426f0929c9e5f8bb8bd807"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.11.3",
            "v0.11.2",
            "v0.11.1",
            "v0.11.0",
            "v0.10.2",
            "v0.10.1",
            "v0.10.0",
            "v0.9.5",
            "v0.9.4",
            "v0.9.3",
            "v0.9.2",
            "v0.9.1",
            "v0.9.0",
            "v0.8.12",
            "v0.8.11",
            "v0.8.10",
            "v0.8.9",
            "v0.8.8",
            "v0.8.7",
            "v0.8.6",
            "v0.8.5",
            "v0.8.4",
            "v0.8.3",
            "v0.8.2",
            "v0.8.1",
            "v0.8.0",
            "v0.7.2",
            "v0.7.1",
            "v0.7.0",
            "v0.6.43",
            "v0.6.42",
            "v0.6.41",
            "v0.6.40",
            "v0.6.39",
            "v0.6.38",
            "v0.6.37",
            "v0.6.36",
            "v0.6.34",
            "v0.6.35",
            "v0.6.33",
            "v0.6.32",
            "v0.6.31",
            "v0.6.30",
            "v0.6.29",
            "v0.6.28",
            "v0.6.27"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-109292.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:31.428465740Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/109xxx/CVE-2026-109292.json",
        "https://github.com/open-webui/open-webui/security/advisories/GHSA-gqfh-jxvw-74rp",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-109292",
        "https://www.vulncheck.com/advisories/open-webui-0.6.27-before-0.11.4-session-token-disclosure-via-oauth-mode-connections",
        "https://github.com/open-webui/open-webui/commit/3cda47cdb449aac970426f0929c9e5f8bb8bd807",
        "https://github.com/open-webui/open-webui/commit/b71744b17823f7a3a9a64cb363e79a7164ed5b23",
        "https://github.com/open-webui/open-webui/commit/f9f815c86220f809fad5ee1300c44f55dea74c79"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-200"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/109xxx/CVE-2026-109292.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-109292",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 498633,
  "published_at": "2026-10-12T16:04:52.925+00:00"
}