High 7.5Published Aug 6, 2026

CVE-2026-70636Flowise 3.1.4 Authentication Bypass via OAuth2 Credential Refresh Endpoint

Updated under an hour ago (2026-10-19 11:23 UTC)

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It affects FlowiseAI Flowise. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for FlowiseAI Flowise

Exploited in the last 30 days

Flowise through 3.1.4 contains an authentication bypass vulnerability that allows unauthenticated attackers to access the OAuth2 credential refresh endpoint by exploiting prefix-based whitelist matching in the authentication middleware defined in packages/server/src/utils/constants.ts. Attackers can send a POST request to the oauth2-credential refresh route with a trailing credential identifier to bypass all authentication and authorization checks, triggering unauthorized OAuth token rotation against credentials belonging to any workspace and potentially disrupting dependent OAuth integrations. This is a bypass of CVE-2026-41273.

CVSS: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Weakness (CWE): CWE-862
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Analyzed
Record last updated: Aug 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

FlowiseAI Flowise flowiseai:flowise (from the name)	through 3.1.4	CNA record
flowiseai flowise flowiseai:flowise	through 3.1.4	NVD

References

https://github.com/Caycon/cve-advisories/blob/main/2026/Flowise/CVE-2026-70636.mdtechnical-description, exploit, third-party-advisory
https://flowiseai.com/sunsetvendor-advisory, not-applicable
https://www.vulncheck.com/advisories/flowise-authentication-bypass-via-oauth2-credential-refresh-endpointthird-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.