CVE-2025-34291

CISA KEV

ACT NOW Priority: 0.00 BB Relevance: 10/100

Published: N/A Modified: N/A First seen: 2026-10-29 Status: pending_score

Description

Langflow contains an origin validation error vulnerability in which an overly permissive CORS configuration combined with a refresh token cookie configured as SameSite=None allows a malicious webpage to perform cross-origin requests that include credentials and successfully call the refresh endpoint. This could allow the attacker to execute arbitrary code and achieve full system compromise via obtained tokens that permit access to authenticated endpoints.

CISA Known Exploited Vulnerability

Vendor / Product Langflow — Langflow

Date Added 2026-05-21

Remediation Due 2026-06-04

This vulnerability could affect an open-source component, third-party library, protocol, or proprietary implementation that could be used by different products. For more information, please see: https://github.com/langflow-ai/langflow ; https://github.com/langflow-ai/langflow/releases/tag/v1.9.3; https://github.com/langflow-ai/langflow/issues/11465#event-25774545848 ; https://nvd.nist.gov/vuln/detail/CVE-2025-34291