CVE-2026-79745Public exploitNetwork attack vectorHinoki check available

Authenticated global prompt tampering via ungated CRUD

Published Aug 31, 2026 · Updated Sep 2, 2026

Missing authorization in MCPHub before 1.0.32 allows remote authenticated users to alter globally served prompts and resources. The POST and PUT prompt and resource routes apply authentication but no administrator gate, and their handlers write request bodies without consulting req.user. A basic non-admin account can create, overwrite, or shadow records that the shared DAOs serve before connected-server content, including templates delivered into other users' sessions.

CVSS severity7.1
High
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Missing authorization in MCPHub before 1.0.32 allows remote authenticated users to alter globally served prompts and resources. The POST and PUT prompt and resource routes apply authentication but no administrator gate, and their handlers write request bodies without consulting req.user. A basic non-admin account can create, overwrite, or shadow records that the shared DAOs serve before connected-server content, including templates delivered into other users' sessions.

The record

CVE
CVE-2026-79745
Published
Aug 31, 2026
Updated
Sep 2, 2026
Vendor
MCPHub
Product
MCPHub
Classifications
CWE-862, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 31, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 2, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.0.32

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

MCPHub · MCPHubversion=< 1.0.32

Published CVSS scores

7.1GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-862Missing Authorization
T1565.001Stored Data Manipulation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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