CVE-2026-21445: PYSEC-2026-2571 - Langflow Missing Authentication on Critical API Endpoints

CVE-2026-21445 · Severity: medium · CVSS 4 · Published 2026-07-13

Langflow Missing Authentication on Critical API Endpoints

Technologies: langflow (PyPI), langflow-base (PyPI). Vendors: PyPI.

Quick answers

Is CVE-2026-21445 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-21445 being exploited in the wild.
How severe is CVE-2026-21445?
Medium severity, with a CVSS score of 4, published 13 July 2026.
Which products and versions are affected?
langflow (PyPI) ECOSYSTEM:introduced=0,fixed=1.7.1; langflow-base (PyPI) ECOSYSTEM:introduced=0,fixed=0.7.1.
Is there a fix for CVE-2026-21445?
Yes. langflow (PyPI): upgrade to 1.7.1 or later; langflow-base (PyPI): upgrade to 0.7.1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2026-21445?
Check whether you run langflow (PyPI) or langflow-base (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • langflow (PyPI): upgrade to 1.7.1 or later
    pip install "langflow>=1.7.1"
  • langflow-base (PyPI): upgrade to 0.7.1 or later
    pip install "langflow-base>=0.7.1"

Affected products

  • langflow (PyPI) ECOSYSTEM:introduced=0,fixed=1.7.1
  • langflow-base (PyPI) ECOSYSTEM:introduced=0,fixed=0.7.1

Identifiers

  • CVE-2026-21445
  • GHSA-c5cp-vx83-jhqx
  • PYSEC-2026-1524
  • PYSEC-2026-2571

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