---
id: CVE-2026-104456
title: >-
  YesWiki before 4.6.7 contains a second-order SQL injection vulnerability in
  AclService::updateRequestWithACL, where a stored username is concatenated
  unescaped into a read-ACL LIKE clause
summary: >-
  YesWiki before 4.6.7 contains a second-order SQL injection vulnerability in
  AclService::updateRequestWithACL, where a stored username is concatenated
  unescaped into a read-ACL LIKE clause. Attackers can self-register an account
  name cont…
severity: high
cvss: 7.6
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L'
cwe:
  - CWE-89
vendor: YesWiki
product: yeswiki
affected:
  - yeswiki < 4.6.7
published: '2026-10-02'
updated: '2026-10-02'
sourceUpdated: '2026-10-02T12:17:17.607'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-104456'
references:
  - url: 'https://github.com/YesWiki/yeswiki/security/advisories/GHSA-6rw5-62xf-q5xp'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/yeswiki-before-4.6.7-second-order-sql-injection-via-acl-username
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-02T12:17:44.341Z'
---

## Overview

YesWiki before 4.6.7 contains a second-order SQL injection vulnerability in AclService::updateRequestWithACL, where a stored username is concatenated unescaped into a read-ACL LIKE clause. Attackers can self-register an account name containing a double-quote payload, then load non-admin ACL-filtered listings to read database contents and bypass read ACLs.

## Remediation

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