CVE-2026-104455 YesWiki before 4.6.7 Read-ACL Bypass via recentchangesrssplus RSS Action
Unauthenticated attackers can bypass read restrictions to view excerpts of private pages via the recentchangesrssplus RSS action.
- 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-2026-104455?
CVE-2026-104455 is a medium-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 an access control bypass vulnerability that allows unauthenticated attackers to read restricted page content via the recentchangesrssplus RSS action. Attackers can request the xml method of a page hosting the action to retrieve 500-character body excerpts of every latest page, including read-restricted drafts and notes.
Weakness: CWE-200
Which versions are affected by CVE-2026-104455?
How do I fix CVE-2026-104455?
No fix has been published for CVE-2026-104455 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-2026-104455 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-104455 exists.
Sources
Also known as GHSA-89vc-h4r4-h25q, GHSA-x8xj-595c-jcc3.