What is CVE-2026-6635?

CVE-2026-6635 is a high-severity vulnerability in Rowboatlabs Rowboat, classified under Improper Authentication. CVSS score: 7.3/10. Published 2026-04-20.

How severe is CVE-2026-6635?

High severity. CVSS v3 base score is 7.3 out of 10.

Auth bypass in Rowboatlabs Rowboat

CVE-2026-6635

A security vulnerability has been detected in rowboatlabs rowboat up to 0.1.67. This impacts the function tool_call of the file apps/experimental/tools_webhook/app.py of the component tools_webhook. Such manipulation of the argument X-Tool…

Vulnerability class: Broken Authentication

EPSS: 0.000 (10.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.

Affected products

Rowboatlabs Rowboat — versions 0.1.0, 0.1.1, 0.1.2

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

VDB-358269 | rowboatlabs rowboat tools_webhook app.py tool_call improper authentication (technical-description, vdb-entry)
VDB-358269 | CTI Indicators (IOB, IOC, IOA) (signature, permissions-required)
Submit #793433 | Rowboat Labs Rowboat 0.1.67 Authentication Bypass Issues (third-party-advisory)
cna@vuldb.com (exploit)

Frequently asked questions

What is CVE-2026-6635?: CVE-2026-6635 is a high-severity vulnerability in Rowboatlabs Rowboat, classified under Improper Authentication. CVSS score: 7.3/10. Published 2026-04-20.
How severe is CVE-2026-6635?: High severity. CVSS v3 base score is 7.3 out of 10.