CVE-2026-77520Network attack vector

Cross-application invocation via leaked application identifiers

Published Sep 21, 2026 · Updated Sep 21, 2026

Broken access control in KubeOperator MaxKB 2.10.2-lts and earlier allows remote authenticated users to invoke others' applications. The homepage question-ranking endpoint exposes a published application's identifier, and workflow application-node save and runtime paths accept that identifier without checking permission. Exploitation requires a same-workspace account, a discoverable application name with ranking activity, and permission to publish a workflow; execution can disclose generated output and persist chat rows under the victim application.

CVSS severityUnavailable
Unscored
EPSS probability0.23%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Get started

Summary

What happened

Broken access control in KubeOperator MaxKB 2.10.2-lts and earlier allows remote authenticated users to invoke others' applications. The homepage question-ranking endpoint exposes a published application's identifier, and workflow application-node save and runtime paths accept that identifier without checking permission. Exploitation requires a same-workspace account, a discoverable application name with ranking activity, and permission to publish a workflow; execution can disclose generated output and persist chat rows under the victim application.

The record

CVE
CVE-2026-77520
Published
Sep 21, 2026
Updated
Sep 21, 2026
Vendor
KubeOperator
Product
MaxKB
Classifications
T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 21, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

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

No CVSS assessment is available in this record.

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 exploitUnconfirmed

Weakness, pattern, technique

T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Get started to see how Hinoki identifies affected software and validates exploitability in your environment.

Get started