---
title: "CVE-2026-77523: MaxKB - Broken Access Control"
description: "MaxKB <= 2.10.3-lts contains a broken access control caused by ModelSerializer.ModelParams loading and saving models by id without workspace_id, letting authenticated users with model read permission in attacker-controlled workspace read or overwrite models in other workspaces, exploit requires authenticated user with model read permission."
url: https://panop.io/threat-heartbeat/CVE-2026-77523/
---

# CVE-2026-77523 MaxKB - Broken Access Control

MaxKB <= 2.10.3-lts contains a broken access control caused by ModelSerializer.ModelParams loading and saving models by id without workspace\_id, letting authenticated users with model read permission in attacker-controlled workspace read or overwrite models in other workspaces, exploit requires authenticated user with model read permission.

CVSS base score 7.4 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.26% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-77523)

## Details

Type

Broken Access Control

Impact

Data Tampering, Information Disclosure

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L

Published

21 September 2026

Updated

15 October 2026

Weakness

[CWE-639](https://cwe.mitre.org/data/definitions/639.html)

## Vendor fix

Update to the latest version once a fix is available.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-77523](https://nvd.nist.gov/vuln/detail/CVE-2026-77523)
- [https://github.com/1Panel-dev/MaxKB/security/advisories/GHSA-g888-8cvh-9284](https://github.com/1Panel-dev/MaxKB/security/advisories/GHSA-g888-8cvh-9284)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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