Information disclosure in Flowiseai Flowise
CVE-2026-70478
Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.3, the POST /api/v1/oauth2-credential/refresh/:credentialId endpoint is included in WHITELIST_URLS and requires no authentication. The endpoint decrypts the stored credential, sends a refresh request to the configured OAuth provider with the client secret and refresh token, and returns the refreshed access_token in the response body. An attacker with a credential ID can use the token to access the victim's connected service and can also exhaust refresh-token quota. This issue is fixed in 3.1.3.
Vulnerability class: Information Disclosure
EPSS: 0.005 (44.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.
Affected products
- Flowiseai Flowise — versions < 3.1.2
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-70478?
- CVE-2026-70478 is a critical-severity vulnerability in Flowiseai Flowise, classified under Information Disclosure. CVSS score: 10.0/10. Published 2026-08-04.
- How severe is CVE-2026-70478?
- Critical severity. CVSS v3 base score is 10.0 out of 10.