CVE-2026-67429CWE-22CWE-73

Flyto2 Core: Arbitrary file write via image.download (and other file-writing modules)

Critical · published July 29, 2026

CVSS v3.1
10.0
EPSS
1%
Percentile
55.1
In the wild
Unconfirmed
What it is

Flyto2 Core is an execution kernel for automation and AI-agent workflows. Prior to 2.26.6, image.download and related file-writing modules use caller-controlled output_dir instead of validate_path_with_env_config and its FLYTO_SANDBOX_DIR confinement, allowing attacker-controlled response bytes to be written to arbitrary filesystem paths the process can access. This issue is fixed in version 2.26.6.

The record
Technical detail
CVSS v3.1
10.0 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00770 · 55.1th percentile
Weaknesses
CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'); CWE-73 · External Control of File Name or Path
Published
2026-07-29T18:50Z
EPSS history
Timeline
  • 29 JUL 18:50Z
    Flyto2 Core: Arbitrary file write via image.download (and other file-writing modules)
    cvelistv5