What is CVE-2026-59726?

CVE-2026-59726 is a critical-severity vulnerability in Ruvnet Ruflo, classified under OS Command Injection. CVSS score: 10.0/10. Published 2026-07-09.

How severe is CVE-2026-59726?

Critical severity. CVSS v3 base score is 10.0 out of 10.

RCE in Ruvnet Ruflo

CVE-2026-59726

Ruflo is an agent meta-harness for Claude Code and Codex. Prior to 3.16.3, ruflo's default docker-compose deployment exposed the MCP bridge POST /mcp and POST /mcp/:group endpoints without authentication, allowing an unauthenticated networ…

Vulnerability class: Command Injection (OS Command Injection)

CVSS v3 metric

CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.

Affected products

Ruvnet Ruflo — versions < 3.16.3

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)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-59726?: CVE-2026-59726 is a critical-severity vulnerability in Ruvnet Ruflo, classified under OS Command Injection. CVSS score: 10.0/10. Published 2026-07-09.
How severe is CVE-2026-59726?: Critical severity. CVSS v3 base score is 10.0 out of 10.