---
id: CVE-2026-104449
title: >-
  YesWiki before 4.6.7 contains an access control vulnerability allowing
  unauthenticated attackers to overwrite any existing wiki page, including pages
  whose write ACL restricts editing, via the Bazar entry-creation flow
summary: >-
  YesWiki before 4.6.7 contains an access control vulnerability allowing
  unauthenticated attackers to overwrite any existing wiki page, including pages
  whose write ACL restricts editing, via the Bazar entry-creation flow.
  Attackers can sub…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:L'
cwe:
  - CWE-639
vendor: YesWiki
product: yeswiki
affected:
  - yeswiki < 4.6.7
published: '2026-10-02'
updated: '2026-10-02'
sourceUpdated: '2026-10-02T12:17:16.433'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-104449'
references:
  - url: 'https://github.com/YesWiki/yeswiki/security/advisories/GHSA-4388-phmh-jrw8'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/yeswiki-before-4.6.7-unauthenticated-page-overwrite-via-bazar-id-fiche
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-02T12:17:44.339Z'
---

## Overview

YesWiki before 4.6.7 contains an access control vulnerability allowing unauthenticated attackers to overwrite any existing wiki page, including pages whose write ACL restricts editing, via the Bazar entry-creation flow. Attackers can submit a crafted entry with an attacker-controlled id_fiche matching an existing page, overwriting its body for mass defacement and content destruction.

## Remediation

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