CVE-2026-67426 PUBLISHED

Flyto2 Core: Unauthenticated flyto-verification /run: callback_url SSRF and internal runner-secret exfiltration

Assigner: GitHub_M
Reserved: 29.07.2026 Published: 29.07.2026 Updated: 29.07.2026

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.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N
CVSS Score: 9.3

Attack Vector	Network	Scope	Changed
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	None	Integrity Impact	Low
User Interaction	None	Availability Impact	None

CVSS 3.1

Product Status

Vendor	flytohub
Product	flyto-core
Versions	Version < 2.26.7 is affected

References

Problem Types

CWE-306: Missing Authentication for Critical Function CWE
CWE-522: Insufficiently Protected Credentials CWE
CWE-918: Server-Side Request Forgery (SSRF) CWE