Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.3, the OAuth2 token refresh endpoint POST /api/v1/oauth2-credential/refresh/:credentialId is unauthenticated by design and performs a server-side HTTP request to the credential-controlled accessTokenUrl without SSRF protections. Runtime validation confirmed that the endpoint was reachable without authentication, triggered outbound POST requests to an attacker-controlled server, reflected the full remote response body to the caller through tokenInfo, and sent client_id, client_secret, grant_type=refresh_token, and refresh_token in the request body. This issue is fixed in version 3.1.3.
{
"cna_assigner": "GitHub_M",
"cwe_ids": [
"CWE-639"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/69xxx/CVE-2026-69250.json"
}{
"extracted_events": [
{
"cpe": "cpe:2.3:a:flowiseai:flowise:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "3.1.3"
}
],
"source": "CPE_RANGE"
},
{
"range": [
{
"fixed": "da8b251a9a4c59484ceaf6f71df7406aede7bef2"
}
],
"source": "REFERENCES_COMMIT"
},
{
"original_tag": "flowise@3.1.3",
"range": [
{
"fixed": "09f099dbfda179e439ec677d06ad737375899eef"
}
],
"source": "REFERENCES_TAG"
}
]
}