CVE-2026-104438: YesWiki before 4.6.7 Information Disclosure via listpagestag and includepages Actions

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-02 · updated 2026-10-02
Weakness: CWE-862

Description

YesWiki before 4.6.7 contains a missing authorization vulnerability in the listpagestag and includepages actions of the tags tool, which enumerate pages without applying read-ACL filtering. Unauthenticated or unprivileged attackers can embed these actions with a chosen tag or page name to disclose the names and body-derived titles of ACL-restricted pages.

Affected products

yeswiki: before 4.6.7 — fixed in 4.6.7

How to fix

Upgrade to a fixed version: yeswiki 4.6.7. Check the vendor advisory for mitigations.

References

https://github.com/YesWiki/yeswiki/security/advisories/GHSA-hx4v-hjvg-9p6w
https://www.vulncheck.com/advisories/yeswiki-before-4.6.7-information-disclosure-via-listpagestag-and-includepages-actions
https://github.com/YesWiki/yeswiki/security/advisories/GHSA-hx4v-hjvg-9p6w

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