CVE-2026-104438 YesWiki before 4.6.7 Information Disclosure via listpagestag and includepages Actions
Unauthenticated attackers can disclose names and titles of ACL-restricted pages in YesWiki by exploiting missing authorization in tag actions.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-104438?
CVE-2026-104438 is a high-severity missing authorization vulnerability in yeswiki, published on 2 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-862
Which versions are affected by CVE-2026-104438?
How do I fix CVE-2026-104438?
No fix has been published for CVE-2026-104438 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-104438 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-104438 exists.
Sources
Also known as GHSA-fm39-cmv6-r4rj, GHSA-hx4v-hjvg-9p6w.