Vulnerability in Langflow
CVE-2025-34291
Langflow versions up to and including 1.6.9 contain a chained vulnerability that enables account takeover and remote code execution. An overly permissive CORS configuration (allow_origins='*' with allow_credentials=True) combined with a re…
EPSS: 0.327 (97.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Langflow — versions 0
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Public proof-of-concept exploits
References
- disclosure@vulncheck.com (Exploit, technical-description, Third Party Advisory, exploit, Mitigation)
- disclosure@vulncheck.com (Product, product)
- disclosure@vulncheck.com (Third Party Advisory, third-party-advisory)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Third Party Advisory)
Frequently asked questions
- What is CVE-2025-34291?
- CVE-2025-34291 is a high-severity vulnerability in Langflow, classified under Origin Validation Error. CVSS score: 8.8/10. Published 2025-12-05.
- How severe is CVE-2025-34291?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2025-34291 known to be exploited?
- Yes. CVE-2025-34291 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-05-21), indicating it is being actively exploited. 2 public proof-of-concept repositories are indexed.