CVE-2026-67426

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

State: Published
Severity: 9.3 Critical
Published: Jul 29, 2026
Updated: Jul 29, 2026
Reserved: Jul 29, 2026

Description

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.

Scores

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

Weaknesses

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

Affected Products

Product	Versions
flyto-coreflytohub	< 2.26.7Affected

References

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