Critical severityNVD Advisory· Published Jul 29, 2026· Updated Jul 29, 2026
Flyto2 Core: Arbitrary file write via image.download (and other file-writing modules)
CVE-2026-67429
Description
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.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
flyto-corePyPI | < 2.26.7 | 2.26.7 |
Affected products
1- Range: <2.26.6
Patches
Vulnerability mechanics
References
5- github.com/advisories/GHSA-2956-977x-2w3rghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-67429ghsaADVISORY
- github.com/flytohub/flyto-core/commit/d5f89d71303e3c1e6418d347c5c55fcd173cc8ccghsax_refsource_MISCWEB
- github.com/flytohub/flyto-core/releases/tag/v2.26.6ghsax_refsource_MISCWEB
- github.com/flytohub/flyto-core/security/advisories/GHSA-2956-977x-2w3rghsax_refsource_CONFIRMWEB
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