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Vulnerability record · CVE-2026-67426 · published 29 July 2026

CVE-2026-67426: Missing authentication for critical function vulnerability

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.

9.3 CVSS 3.1 Critical EPSS 0.51% · top 59.1% CWE-306 · Missing authentication for critical functionCWE-522 · Insufficiently protected credentials Deferred
9.3CVSS 3.1 base score
0.51%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
4References
30 Jul 2026Last modified by NVD

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.

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

References

LinkTags
https://github.com/flytohub/flyto-core/commit/0a0a528520ec18f5a21f1ddf858a71cc1edfb6e9
https://github.com/flytohub/flyto-core/releases/tag/v2.26.7
https://github.com/flytohub/flyto-core/security/advisories/GHSA-jx74-cqjv-2c67
https://github.com/flytohub/flyto-core/security/advisories/GHSA-jx74-cqjv-2c67

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Source: NIST National Vulnerability Database (record CVE-2026-67426), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.