Obot 0.21.1 through 0.24.1 Authorization Bypass via /mcp-connect-composite/ Route (CVE-2026-103758) | HOL Guard CVE

High · CVSS 8.6CVE-2026-103758

Obot 0.21.1 through 0.24.1 Authorization Bypass via /mcp-connect-composite/ Route

Answer in brief

CVE-2026-103758 records a High severity (CVSS 8.6) vulnerability in Obot 0.21.1 through 0.24.1 Authorization Bypass via /mcp-connect-composite/ Route. The current sources do not mark it as known exploited. The current feed maps obot-platform/obot (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 1, 2026Updated Oct 1, 2026Source checked Oct 1, 2026First seen by HOL Oct 1, 2026Material review Oct 1, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 8.6
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

CVSS is 8.6. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps obot-platform/obot (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
obot-platform/obotgeneric	>=0.21.1 <=0.24.1	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for obot-platform/obot.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Oct 1, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Oct 1, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Oct 1, 2026

Sources and claim methodology

Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.