CVE-2026-67429: Flytohub Flyto2 Core path traversal in file-writing modules

CVE-2026-67429 · Severity: critical · CVSS 10 · Published 2026-07-29

Flyto2 Core, a library used for AI agent operations and document processing, contains a vulnerability that allows an attacker to write files to any location on the server's disk. By bypassing intended security sandboxes, an attacker could overwrite critical system configurations or inject malicious code. This could lead to a complete takeover of the server where the software is running.

Technologies: flyto-core (PyPI). Vendors: PyPI.

Quick answers

Is CVE-2026-67429 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-67429 being exploited in the wild.
How severe is CVE-2026-67429?
Critical severity, with a CVSS score of 10, published 29 July 2026.
Which products and versions are affected?
flyto-core (PyPI) < 2.26.7, ECOSYSTEM:introduced=0,fixed=2.26.7.
Is there a fix for CVE-2026-67429?
Yes. flyto-core (PyPI): upgrade to 2.26.7 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-67429 attacked?
It is attacked over the network, in a software library.
Am I affected by CVE-2026-67429?
Check whether you run flyto-core (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

  • flyto-core (PyPI): upgrade to 2.26.7 or later
    pip install "flyto-core>=2.26.7"

Technical details

A path traversal vulnerability exists in Flyto2 Core due to improper path validation in multiple file-writing modules, most notably 'image.download'. While the software attempts to use 'os.path.commonpath' to restrict writes, it allows the caller to provide the 'output_dir' parameter used as the validation base. An attacker can set 'output_dir' to the root directory ('/'), rendering the check ineffective and allowing arbitrary file writes to any location the process has permissions for. Other affected modules include image processing (convert, resize, crop), document generation (excel_write, pdf_fill_form), and browser pagination. This is exploitable via the MCP tool interface or hosted API clients. The vulnerability is patched in version 2.26.7.

Affected products

  • flytohub flyto-core < 2.26.7

Identifiers

  • CVE-2026-67429
  • GHSA-2956-977x-2w3r
  • PYSEC-2026-3568

Timeline

  • 2026-07-07: disclosed
  • 2026-07-29: kev added: NVD publication date
  • 2026-07-30: patched: GitHub Advisory published and reviewed

References

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