Is It On KEV?

Langflow Langflow

YES - ON THE CISA KEV LIST
CVE-2025-34291

Langflow Origin Validation Error Vulnerability

CISA catalog due date2026-06-04
160 days past due
EPSS exploit probability (next 30 days)93.2% · 100percentile
From CVE publication to KEV listing167 days (2025-12-05 → 2026-05-21)
Remediation window (KEV listing to due date)14 days
Days on the KEV list174 days
Date added to KEV2026-05-21
Known ransomware campaign useUnknown
VendorLangflow
ProductLangflow
Weaknesses (CWE)CWE-346

Langflow: 5 entries (0.3% of all KEV entries are from this vendor); 4 added in 2026.

BOD 26-04 note: this is the date printed in the CISA catalog. A federal agency's actual deadline is set by its SSVC tier - Act (3 days), Attend (14 days), Track (60 days), or the next scheduled upgrade - counted from the KEV listing date or the date the vulnerability is identified in its environment, whichever comes first. Use the tier helper on each CVE page for your own window.

Your BOD 26-04 window (SSVC tier helper)

Your remediation window ends:

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.

Required action (CISA)

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Notes

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

References

Other KEV entries for this vendor: Langflow

Langflow - Vendors with KEV entries

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