Which products and versions are affected by CVE-2026-59726?

Affected: ruflo. The full list is in the CVE brief.

Is CVE-2026-59726 being exploited in the wild?

It is not listed in any known-exploited vulnerabilities catalog.

Is CVE-2026-59726 in the CISA KEV catalog?

No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.

Is there a public exploit for CVE-2026-59726?

No public exploit code is known.

Is there a fix for CVE-2026-59726?

Fixed versions are available, including ruflo 3.16.3.

How urgently should CVE-2026-59726 be patched?

Brandefense priority: patch in the next maintenance window, because of its high severity, although no exploitation is known.

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Vulnerability Intelligence

CVE-2026-59726

Critical

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 network attacker to invoke tools/call to terminal_execute, obtain a shell in the bridge container, read…

Published Jul 9, 2026 · Updated Aug 12, 2026 · Also known as EUVD-2026-42656, GHSA-c4hm-4h84-2cf3

Key Facts

Patch in the next maintenance window

CVE-2026-59726 is a critical-severity vulnerability (CVSS 10.0 v3.1) affecting ruflo.
It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
EPSS estimates a 3.0% probability of exploitation in the next 30 days.
Fixed versions are available, including ruflo 3.16.3.
Brandefense priority: patch in the next maintenance window, because of its high severity, although no exploitation is known.

CVSS v3.1

10.0

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

EPSS (30-day exploit likelihood)

3.0%

Higher than 87.2% of all scored CVEs

Exploited in the wild

No known

Not in a known-exploited catalog

Public exploit code

None known

Get the full CVE-2026-59726 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

Description

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 network attacker to invoke tools/call to terminal_execute, obtain a shell in the bridge container, read provider API keys, and poison AgentDB learning-store patterns. This issue is fixed in version 3.16.3.

Affected Products

1 affected entries in total

Product	Affected versions	Fixed in
ruflo	See advisory	3.16.3

Patched Releases

ruflo

3.16.3

Timeline

Publicly disclosed
Jul 9, 2026
Last updated
Aug 12, 2026

Weakness Type

CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CWE-306 Missing Authentication for Critical Function
CWE-942 Permissive Cross-domain Security Policy with Untrusted Domains

References

1 more references in the full CVE brief

FAQ

Common Questions.

Ruflo is an agent meta-harness for Claude Code and Codex.
Affected: ruflo. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including ruflo 3.16.3.
Brandefense priority: patch in the next maintenance window, because of its high severity, although no exploitation is known.

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