CVE-2026-67426: Flytohub Flyto-Core

Critical severity, CVSS 9.3. EPSS: 0.5% chance of exploitation in the next 30 days.

Flyto2 Core is an execution kernel for automation and AI-agent workflows. Prior to 2.26.7, the standalone flyto-verification service in src/core/verification_service.py exposes unauthenticated POST /run on 0.0.0.0:8344 and uses client-supplied callback_url for an outbound POST with X-Internal-Key: $FLYTO_RUNNER_SECRET while bypassing target_allowed, allowing unauthenticated SSRF and runner secret exfiltration. This issue is fixed in version 2.26.7.

Affected products

• Flytohub Flyto-Core: before 2.26.7 (fixed in 2.26.7)

Published 2026-07-29. Last modified 2026-07-30.