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Back to active CVEs
High · CVSS 7.7CVE-2026-79750

MCPHub authenticated horizontal IDOR: any non-admin user executes tools on other users' MCP servers (cross-tenant file read + SSRF)CVE-2026-79750

Answer in brief

CVE-2026-79750 records a High severity (CVSS 7.7) vulnerability in MCPHub authenticated horizontal IDOR: any non-admin user executes tools on other users' MCP servers (cross-tenant file read + SSRF). The current sources do not mark it as known exploited. The current feed maps samanhappy/mcphub (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 Aug 31, 2026Updated Sep 8, 2026Source checked Oct 16, 2026First seen by HOL Aug 31, 2026Material review Sep 8, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 7.7
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 7.7. 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 samanhappy/mcphub (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
samanhappy/mcphubgeneric<1.0.301.0.30

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for samanhappy/mcphub.
  2. 2Review the reported fix. Update samanhappy/mcphub to 1.0.30 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Aug 31, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Sep 8, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Aug 31, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
Upstream source description

MCPHub is a unified hub for centrally managing and dynamically orchestrating multiple MCP servers/APIs into separate endpoints with flexible routing strategies. Prior to version 1.0.30, MCPHub scopes non-admin users to servers they own (list views and config edits enforce ownership), but the tool-execution API does not. Any authenticated non-admin user can invoke tools on MCP servers owned by other users — servers they cannot even see in GET /api/servers. Because connected MCP servers carry real capability (filesystem, HTTP fetch, cloud APIs with the owner's keys), this is cross-tenant compromise: demonstrated arbitrary host file read (/etc/passwd, another user's secrets) and SSRF. This issue has been patched in version 1.0.30.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • FiboSearch <= 1.34.2 - Authenticated (Subscriber+) Stored Cross-Site Scripting via 'purchased_plan' ParameterSame generic ecosystem
  • Social Share Buttons <= 1.30 - Authenticated (Subscriber+) Stored Cross-Site Scripting via 'share_url' Network SettingSame generic ecosystem
  • Cifs-utils: mount.cifs credential-file option injection allows local privilege boundary bypassSame generic ecosystem
  • Sunshine Photo Cart <= 3.7.4 - Unauthenticated PHP Object Injection via 'key' ParameterSame generic ecosystem
  • WP Compress <= 7.25.00 - Unauthenticated Privilege Escalation to 'group'/'setting'/'value' Parameters on comms EndpointSame generic ecosystem
  • HUSKY <= 1.4.5 - Unauthenticated Sensitive Information Exposure in 'woof_tm_data' Localized ScriptSame generic ecosystem

Record context

Vulnerability class
Tool Poisoning
EPSS
Not reported
CWE IDs
CWE-639
Source
CVE List V5
Source checked
Oct 16, 2026
References
2 linked sources
Open source record