---
id: CVE-2026-52466
title: >-
  Open Library Foundation VuFind v11.0.3 and v4.1 is vulnerable to toInorrect
  Access Control
summary: >-
  Open Library Foundation VuFind v11.0.3 and v4.1 is vulnerable to toInorrect
  Access Control. The application fails to stop processing an incoming request
  in VuFind\Controller\AbstractBase::validateAccessPermission after it has found
  that …
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-863
published: '2026-08-06'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T16:04:24.933'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-52466'
references:
  - url: 'https://vufind.org/wiki/security:cve-2026-52466'
    label: cve@mitre.org
tags:
  - nvd
epss: 0.00483
epssPercentile: 0.39018
ingestedAt: '2026-09-09T16:14:05.512Z'
---

## Overview

Open Library Foundation VuFind v11.0.3 and v4.1 is vulnerable to toInorrect Access Control. The application fails to stop processing an incoming request in VuFind\Controller\AbstractBase::validateAccessPermission after it has found that controller level access permissions do not allow access to the requested function. The requester receives a response indicating that access was denied, but the actual function is executed regardless of that.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.