HIGHCVSS 8.8Actively exploited · CISA KEV since 2026-05-21Vulnerability
CVE-2025-34291
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.
Properties
- Euvd product
- langflow
- Vulnerability name
- Langflow Origin Validation Error Vulnerability
- First seen
- 2026-10-08T15:21:21+00:00
- Cvss score
- 8.8
- Epss score
- 0.92808
- Last seen
- 2026-10-19T12:00:27+00:00
- Due date
- 2026-06-04
- Euvd assigner
- VulnCheck
- Retrieved at
- 2026-10-21T01:24:47+00:00
- Exploited euvd since
- 2026-05-21T00:00:00+00:00
- Src batch id
- epss_history-20261020T103617Z-728ddd
- Source url
- https://epss.empiricalsecurity.com/epss_scores-2026-10-19.csv.gz
- Date added
- 2026-05-21
- Score
- 8.8
- Euvd base score version
- 4.0
- Fetched at
- 2026-10-20T10:36:20+00:00
- Euvd vendor
- Langflow, langflow-ai
- Cvss vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- In Signal since
- initial import (Sep 2026)
- Euvd base score
- 9.4
Related Entities (6)
MENTIONED_IN (2)
AFFECTS_PRODUCT (1)
DESCRIBES (1)
HAS_WEAKNESS (1)
INVOLVES (1)
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