What is CVE-2026-67427?

CVE-2026-67427 is a high-severity vulnerability in Flytohub Flyto-Core, classified under Insufficiently Protected Credentials. CVSS score: 8.6/10. Published 2026-07-29.

How severe is CVE-2026-67427?

High severity. CVSS v3 base score is 8.6 out of 10.

Vulnerability in Flytohub Flyto-Core

CVE-2026-67427

Flyto2 Core is an execution kernel for automation and AI-agent workflows. Prior to 2.26.6, the workflow engine variable resolver expands ${env.VAR} for any host environment variable without an allowlist or capability policy check, allowing a workflow parameter to bypass the default capability policy denylist for env.get and env.load_dotenv and exfiltrate secrets through allowed modules. This issue is fixed in version 2.26.6.

EPSS: 0.004 (29.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N.

Affected products

Flytohub Flyto-core — versions < 2.26.6

Weakness classification (CWE)

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-67427?: CVE-2026-67427 is a high-severity vulnerability in Flytohub Flyto-Core, classified under Insufficiently Protected Credentials. CVSS score: 8.6/10. Published 2026-07-29.
How severe is CVE-2026-67427?: High severity. CVSS v3 base score is 8.6 out of 10.