What is CVE-2026-104438?

CVE-2026-104438 is a medium-severity vulnerability in Yeswiki, classified under Missing Authorization. CVSS score: 5.3/10. Published 2026-10-02.

How severe is CVE-2026-104438?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Auth bypass in Yeswiki

CVE-2026-104438

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.

Vulnerability class: Broken Access Control

Published 2026-10-02 · last modified 2026-10-02.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Yeswiki

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

GitHub Security Advisory (GHSA-hx4v-hjvg-9p6w) (vendor-advisory)
VulnCheck Advisory: YesWiki before 4.6.7 Information Disclosure via listpagestag and includepages Actions (third-party-advisory)

Frequently asked questions

What is CVE-2026-104438?: CVE-2026-104438 is a medium-severity vulnerability in Yeswiki, classified under Missing Authorization. CVSS score: 5.3/10. Published 2026-10-02.
How severe is CVE-2026-104438?: Medium severity. CVSS v3 base score is 5.3 out of 10.