CVE-2026-67426CWE-306CWE-522CWE-918

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

Critical · published July 29, 2026

CVSS v3.1
9.3
EPSS
1%
Percentile
42.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.3 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00507 · 42.4th percentile
Weaknesses
CWE-306 · Missing Authentication for Critical Function; CWE-522 · Insufficiently Protected Credentials; CWE-918 · Server-Side Request Forgery (SSRF)
Published
2026-07-29T18:43Z
EPSS history
Timeline
  • 29 JUL 18:43Z
    Flyto2 Core: Unauthenticated flyto-verification /run: callback_url SSRF and internal runner-secret exfiltration
    cvelistv5