CVE-2026-104449

Medium

Description

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.

SeverityMedium

CVSS6.5

Exploit probability—

Product

Yeswiki

PublishedOct 2, 2026

First seenOct 2, 2026

Weakness typeCWE-639Authorization bypass through user-controlled key

How to fix

Update

YesWiki yeswiki4.6.7 or later

Vendor advisories

github.com/YesWiki/yeswiki/security/advisories/GHSA-4388-phmh-jrw8

Affected products

Product	Affected versions	Fixed in
YesWiki yeswiki	v < 4.6.7	4.6.7

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