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      <title>CVE-2026-70636 — Flowise 3.1.4 Authentication Bypass via OAuth2 Credential Refresh Endpoint</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2026-70636</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; FlowiseAI Flowise&lt;/p&gt;
&lt;p&gt;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.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; FlowiseAI Flowise&lt;/p&gt;
&lt;p&gt;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.&lt;/p&gt;</content:encoded>
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