CVE-2026-67429
CRITICALFlyto2 Core: Arbitrary file write via image.download (and other file-writing modules)
Title source: cnaDescription
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.
References (3)
Core 3
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/flytohub/flyto-core/security/advisories/GHSA-2956-977x-2w3r
X_Refsource_Misc x_refsource_misc
https://github.com/flytohub/flyto-core/commit/d5f89d71303e3c1e6418d347c5c55fcd173cc8cc
X_Refsource_Misc x_refsource_misc
https://github.com/flytohub/flyto-core/releases/tag/v2.26.6
Scores
CVSS v3
10.0
EPSS
0.0049
EPSS Percentile
39.7%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
yes
Technical Impact
total
Details
CWE
CWE-22
CWE-73
Status
published
Products (2)
flytohub/flyto-core
< 2.26.6
pypi/flyto-core
0 - 2.26.7PyPI
Published
Jul 29, 2026
Tracked Since
Jul 30, 2026