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CVE-2025-3248 — Vulnerability in langflow — CVE Details

CRITICAL

Langflow Unauth RCE

Published June 17, 2025Updated June 29, 2026Source: osv

Summary

Langflow versions prior to 1.3.0 are susceptible to code injection in the /api/v1/validate/code endpoint. A remote and unauthenticated attacker can send crafted HTTP requests to execute arbitrary code.

Advisory Timeline

  • First published June 17, 2025 (482 days ago).
  • Last revised June 29, 2026 — 377 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

pip
Update langflow to 1.3.0 or later
pip install "langflow>=1.3.0"
pip
Update langflow-base to 0.3.0 or later
pip install "langflow-base>=0.3.0"

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (2)

Affects 1 ecosystem: pypi (2).

PackageEcosystemAffectedFixed In
langflow
pypi
0.0.31, 0.0.32, 0.0.33, 0.0.40 (+249 more)1.3.0
langflow-base
pypi
0.0.13, 0.0.14, 0.0.15, 0.0.16 (+89 more)0.3.0

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 9.8 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
—
Confidentiality
—
Integrity
—
Availability
—

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A

Frequently Asked Questions

What is CVE-2025-3248?
Langflow Unauth RCE This vulnerability has been assigned a severity rating of CRITICAL (CVSS score: 9.8/10).
How do I check if my project is affected by CVE-2025-3248?
CVE-2025-3248 affects langflow and langflow-base. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2025-3248 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
9.8

Exploitation is straightforward and causes maximum impact. Patch immediately.

Also Known As

GHSA-rvqx-wpfh-mfx7
PYSEC-2025-36
PYSEC-2026-380

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