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.
{
"cna_assigner": "VulnCheck",
"cwe_ids": [
"CWE-200"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/109xxx/CVE-2026-109292.json"
}{
"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"
}
]
}