CVE-2026-67426 json
Flyto2 Core: Unauthenticated flyto-verification /run: callback_url SSRF and internal runner-secret exfiltration
published 2026-07-29 3 mo ago modified 2026-10-24 16 d ago also GHSA-jx74-cqjv-2c67 , PYSEC-2026-3571 , EUVD-2026-50470
- cvss
- 9.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 31%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- pypi flyto-core 2.26.7
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 3 mo ago
Exploit prediction
0.37% chance of exploitation in the next 30 days, higher than 31% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/flytohub/flyto-core/security/advisories/GHSA-jx74-cqjv-2c67 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N |
| OSV | 3.1 | 9.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N |
| GitHub | 3.1 | 9.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | flyto-core | >=2.26.6, <2.26.7 <2.26.7 |
2.26.7 |
Affected products
- flytohub flyto-core
Classification
References
-
github.com
/flytohub/flyto-core/commit/0a0a528520ec18f5a21f1ddf858a71cc1edfb6e9
web
-
github.com
/flytohub/flyto-core/security/advisories/GHSA-jx74-cqjv-2c67
exploit, web
-
github.com
/flytohub/flyto-core/releases/tag/v2.26.7
web
-
nvd.nist.gov
/vuln/detail/CVE-2026-67426
advisory
-
github.com
/flytohub/flyto-core
package
-
github.com
/pypa/advisory-database/tree/main/vulns/flyto-core/PYSEC-2026-3571.yaml
web
-
pypi.org
/project/flyto-core
package
-
github.com
/advisories/GHSA-jx74-cqjv-2c67
advisory
Sources
- CVE List CVE-2026-67426
- GitHub Advisory GHSA-jx74-cqjv-2c67
- NVD CVE-2026-67426
- OSV PYSEC-2026-3571
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