critical9.3
CVE-2026-67426
Flyto2 Core: Unauthenticated flyto-verification /run: callback_url SSRF and internal runner-secret exfiltration
Impact
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 packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | flyto-core | >= 2.26.6, < 2.26.7 | 2.26.7 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-jx74-cqjv-2c67
- https://github.com/flytohub/flyto-core/security/advisories/GHSA-jx74-cqjv-2c67
- https://nvd.nist.gov/vuln/detail/CVE-2026-67426
- https://github.com/flytohub/flyto-core/commit/0a0a528520ec18f5a21f1ddf858a71cc1edfb6e9
- https://github.com/flytohub/flyto-core/releases/tag/v2.26.7
- https://github.com/pypa/advisory-database/tree/main/vulns/flyto-core/PYSEC-2026-3571.yaml