CVE-2026-77518Public exploitNetwork attack vectorHinoki check available

Cross-user MCP configuration disclosure via unchecked tool IDs

Published Sep 21, 2026 · Updated Sep 22, 2026

Missing authorization in KubeOperator MaxKB 2.10.2-lts and earlier allows remote authenticated users to read another user's MCP tool configuration. The tool-detail route returns Tool.code by identifier without the list route's resource check, while workflow save and debug accept a foreign mcp_tool_id without verifying permission. Exploitation requires users in the same workspace, knowledge of an active victim tool ID, and workflow edit access for owner-configured MCP use.

CVSS severity5.0
Medium
EPSS probability0.27%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Missing authorization in KubeOperator MaxKB 2.10.2-lts and earlier allows remote authenticated users to read another user's MCP tool configuration. The tool-detail route returns Tool.code by identifier without the list route's resource check, while workflow save and debug accept a foreign mcp_tool_id without verifying permission. Exploitation requires users in the same workspace, knowledge of an active victim tool ID, and workflow edit access for owner-configured MCP use.

The record

CVE
CVE-2026-77518
Published
Sep 21, 2026
Updated
Sep 22, 2026
Vendor
KubeOperator
Product
MaxKB
Classifications
CWE-862
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 22, 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=<= 2.10.2-lts

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

KubeOperator · MaxKBversion=<= 2.10.2-lts

Published CVSS scores

5.0GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N

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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-862Missing Authorization

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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