What is CVE-2026-103758?

CVE-2026-103758 is a high-severity vulnerability in Obot-Platform Obot, classified under Incorrect Authorization. CVSS score: 8.1/10. Published 2026-10-01.

How severe is CVE-2026-103758?

High severity. CVSS v3 base score is 8.1 out of 10.

Auth bypass in Obot-Platform Obot

CVE-2026-103758

Obot 0.21.1 through 0.24.1 contains an authorization bypass vulnerability that allows authenticated users to reach MCP servers because the checkUI deny list omits the /mcp-connect-composite/ route. Basic-role users with a composite MCP ID can proxy requests through mcpGateway.Proxy to invoke tools on MCP servers restricted by Access Control Rules.

Vulnerability class: Broken Access Control

Published 2026-10-01.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Obot-Platform Obot

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

github.com/obot-platform/obot/security/advisories/GHSA-6fwv-3h4c-37j9 (vendor-advisory)
www.vulncheck.com/advisories/obot-0.21.1-through-0.24.1-authorization-bypass-vi… (third-party-advisory)

Frequently asked questions

What is CVE-2026-103758?: CVE-2026-103758 is a high-severity vulnerability in Obot-Platform Obot, classified under Incorrect Authorization. CVSS score: 8.1/10. Published 2026-10-01.
How severe is CVE-2026-103758?: High severity. CVSS v3 base score is 8.1 out of 10.