UNKNOWNKNOWN EXPLOITED

CVE-2025-34291

Langflow Origin Validation Error Vulnerability

Published: 2026-05-21
Modified: 2026-07-31
Sources: cisa-kev

Summary

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.

References

https://www.cisa.gov/known-exploited-vulnerabilities-catalog

Includes data from the CISA Known Exploited Vulnerabilities catalog.

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