Exploited Vulnerabilities DailyCVE-2025-34291: Langflow Langflow
EPSS92.8%No. 417 of 1739 in KEV
CVE year2025~1 yrs before listing
Same vendor in KEV5
Same product5
| Field | Value |
|---|---|
| Vendor | Langflow |
| Product | Langflow |
| Name | Langflow Origin Validation Error Vulnerability |
| Added to KEV | 2026-05-21 |
| US federal due date | 2026-06-04 |
| Ransomware use | Unknown |
| CWE | CWE-346 |
CISA 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.
Other entries for this product
| CVE | Vendor / product | Added | EPSS | Ransomware |
|---|---|---|---|---|
| CVE-2026-0770 | Langflow Langflow | 2026-07-21 | 63.0% | Unknown |
| CVE-2026-55255 | Langflow Langflow | 2026-07-07 | 0.8% | Unknown |
| CVE-2026-33017 | Langflow Langflow | 2026-03-25 | 24.7% | Unknown |
| CVE-2025-3248 | Langflow Langflow | 2025-05-05 | 99.9% | Known |
Data from CISA's Known Exploited Vulnerabilities (KEV) catalog. EPSS is FIRST's estimated probability of exploitation activity in the next 30 days, refreshed weekly. Always follow the vendor's official guidance.
About this page
A Langflow Langflow vulnerability added to CISA's Known Exploited Vulnerabilities catalog on 2026-05-21.