Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-70636

CVE-2026-70636HIGH

FlowiseAI Flowise — Flowise 3.1.4 Authentication Bypass via OAuth2 Credential Refresh Endpoint

  AV  AC  AT  PR  UI  VC  VI  VA   CVSS    EPSS   %ile   KEV
   N   L   N   N   N   N   H   N    8.7   .0066   49.9     —

AFFECTED
  Product  Versions     Fixed
  Flowise  unspecified  —

TIMELINE
  Aug 4   Reserved by VulnCheck
  Aug 6   Published (CNA: VulnCheck)
  Aug 7   EXPLOIT PUBLISHED — CVE-2026-70636 (FlowiseAI Flowise). Public exploit reference added.
  Aug 13  EXPLOIT PUBLISHED — CVE-2026-70636 (FlowiseAI Flowise). Public exploit reference added.
  Sep 15  EXPLOIT PUBLISHED — CVE-2026-70636 (FlowiseAI Flowise). Public exploit reference added.

CWE-862 · CNA: VulnCheck · CVSS v4.0 · 3 references · NVD status: Analyzed

Description

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.

Lifecycle

Complete event history — 5 events, chronological
Date	Event	Detail
August 4, 2026	Reserved	Reserved by VulnCheck
August 6, 2026	Published	Published (CNA: VulnCheck)
August 7, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-70636 (FlowiseAI Flowise). Public exploit reference added.
August 13, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-70636 (FlowiseAI Flowise). Public exploit reference added.
September 15, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-70636 (FlowiseAI Flowise). Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
FlowiseAI	Flowise	—	—	—

Weaknesses

CWE-862

References (3)

https://flowiseai.com/sunset [Not Applicable]
https://github.com/Caycon/cve-advisories/blob/main/2026/Flowise/CVE-2026-70636.md [Exploit, Third Party Advisory]
https://www.vulncheck.com/advisories/flowise-authentication-bypass-via-oauth2-credential-refresh-endpoint [Third Party Advisory]

Authoritative record: CVE-2026-70636 at cve.org

Vendors: flowiseai

Weaknesses: CWE-862

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-70636 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.